Table of Contents
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Features
■
Operating voltage: 7.5 V - 85 V
■
Dual full bridge gate driver for N-channel
MOSFETs
■
Fully programmable gate driving
■
Embedded Miller clamp function
■
Programmable speed profile
■
Up to 1/16 microstepping
■
Advanced current control with auto-adaptive
decay mode
■
Integrated voltage regulators
■
SPI interface
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Low quiescent standby currents
■
Programmable non-dissipative overcurrent
protection
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Overtemperature protection
Applications
■
Bipolar stepper motor
Description
The L6482, realized in analog mixed signal
technology, is an advanced fully integrated
solution suitable for driving two-phase bipolar
stepper motors with microstepping.
It integrates a dual full bridge gate driver for N-
channel MOSFET power stages with embedded
Table 1.
Device summary
Order code
L6482H
L6482HTR
October 2012
This is information on a product in full production.
Fully integrated microstepping motor driver
non-dissipative overcurrent protection. Thanks to
a new current control, a 1/16 microstepping is
achieved through an adaptive decay mode which
outperforms traditional implementations. The
digital control core can generate user defined
motion profiles with acceleration, deceleration,
speed or target position easily programmed
through a dedicated register set. All application
commands and data registers, including those
used to set analog values (i.e. current protection
trip point, deadtime, PWM frequency, etc.) are
sent through a standard 5-Mbit/s SPI. A very rich
set of protections (thermal, low bus voltage,
overcurrent and motor stall) make the L6482
"bullet proof", as required by the most demanding
motor control applications.
Package
HTSSOP38
HTSSOP38
Doc ID 023768 Rev 1
with motion engine and SPI
Datasheet
HTSSOP38
Packaging
Tape and reel
L6482
−
production data
Tube
1/73
www.st.com
73
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Related Manuals for ST HTSSOP38
Summary of Contents for ST HTSSOP38
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Page 1: Table 1. Device Summary
MOSFETs ■ Fully programmable gate driving ■ Embedded Miller clamp function ■ Programmable speed profile HTSSOP38 ■ Up to 1/16 microstepping non-dissipative overcurrent protection. Thanks to ■ Advanced current control with auto-adaptive a new current control, a 1/16 microstepping is... -
Page 2: Table Of Contents
Contents L6482 Contents Block diagram ..........8 Electrical data . - Page 3 L6482 Contents Overcurrent detection ........27 6.10 Undervoltage lockout (UVLO) .
- Page 4 Contents L6482 9.1.13 TOFF_MIN ..........49 9.1.14 ADC_OUT .
- Page 5 L6482 List of tables List of tables Table 1. Device summary ............1 Table 2.
- Page 6 HTSSOP38 mechanical data ........
- Page 7 HTSSOP38 package dimensions ........
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Page 8: Block Diagram
Block diagram L6482 Block diagram Figure 1. Block diagram VSREG VCC REG VREG VBOOT Charge VREG pump Voltage reg. Voltage reg. Vboot HVGA1 Temperature ADCIN OUTA1 sensing LVGA1 Vboot HVGA2 OUTA2 LVGA2 CORE LOGIC VSENSEA Vboot HVB1 STBY/RESET Current OUTB1 FLAG sensing LVGB1... -
Page 9: Electrical Data
L6482 Electrical data Electrical data Absolute maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Test condition Value Unit Logic interface supply voltage Logic supply voltage Motor supply voltage Low-side gate driver supply voltage Boot voltage BOOT High-side gate driver supply ΔV 0 to 20 BOOT... -
Page 10: Recommended Operating Conditions
CCREG supply voltage generated Integrated ADC input voltage (ADCIN pin) Operating junction temperature - 25 °C Thermal data Table 4. Thermal data Symbol Parameter Package Typ. Unit Thermal resistance junction-to-ambient HTSSOP38 °C/W thj-a 10/73 Doc ID 023768 Rev 1... -
Page 11: Electrical Characteristics
L6482 Electrical characteristics Electrical characteristics = 48 V = 7.5 V; T = 25 °C, unless otherwise specified. Table 5. Electrical characteristics Symbol Parameter Test condition Min. Typ. Max. Unit General UVLO_VAL set high 10.4 10.9 UVLO turn-on threshold CCthOn UVLO_VAL set low UVLO_VAL set high 10.5... - Page 12 Electrical characteristics L6482 Table 5. Electrical characteristics (continued) Symbol Parameter Test condition Min. Typ. Max. Unit Ω Charge pump low-side R resistance pumpLS DS(ON) Average boot current boot Gate driver outputs 10.6 11.3 20.7 = 38 V Programmable high-side and low-side gate >...
- Page 13 L6482 Electrical characteristics Table 5. Electrical characteristics (continued) Symbol Parameter Test condition Min. Typ. Max. Unit = 96 mA GATE SRgate Gate driver output slew rate = 15 V V/μs = 15 nF GATE Deadtime and blanking TDT= '00000' Programmable deadtime TDT=’11111’...
- Page 14 Electrical characteristics L6482 Table 5. Electrical characteristics (continued) Symbol Parameter Test condition Min. Typ. Max. Unit Maximum SPI clock frequency CK,MAX SPI clock rise and fall time µs SPI clock high and low time Chip select setup time setCS Chip select hold time holCS Deselect time disCS...
- Page 15 L6482 Electrical characteristics Table 5. Electrical characteristics (continued) Symbol Parameter Test condition Min. Typ. Max. Unit Power bridges disabled, Charge pump power-on and wake-up time cpwu = 10 nF, C = 220 boot nF, V =15 V Internal voltage regulators Low (default), I = 10 Internal V...
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Page 16: Pin Connection
Pin connection L6482 Pin connection Figure 2. Pin connection (top view) LVGA1 LVGA2 OUTA1 OUTA2 HVGA2 HVGA1 EPAD SENSEA ADCIN STBY/RESET VBOOT STCK PGND FLAG BUSY/SYNC DGND VCCREG VSREG VDDIO VREG OSCIN OSCOUT AGND SENSEB HVGB1 HVGB2 OUTB1 OUTB2 LVGB1 LVGB2 AM15032v1 Pin list... - Page 17 L6482 Pin connection Table 6. Pin description (continued) Name Type Function HVGA2 Power output High-side half bridge A2 gate driver output HVGB1 Power output High-side half bridge B1 gate driver output HVGB2 Power output High-side half bridge B2 gate driver output LVGA1 Power output Low-side half bridge A1 gate driver output...
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Page 18: Typical Applications
Typical applications L6482 Typical applications Table 7. Typical application values Name Value 220 µF VSPOL 220 nF 470 nF BOOT 47 nF 100 nF VSREG 470 nF 100 nF VCCREG 100 nF VREG 22 µF VREGPOL 100 nF Charge pump diodes Q1,Q2,Q3,Q4,Q5,Q6,Q7 STD25NF10 39 kΩ... -
Page 19: Functional Description
L6482 Functional description Functional description Device power-up During power-up, the device is under reset (all logic IOs disabled and power bridges in high impedance state) until the following conditions are satisfied: ● is greater than V CCthOn is greater than ΔV ●... -
Page 20: Microstepping
Functional description L6482 Figure 4. Charge pump circuitry BOOT VBOOT to high-side gate drivers PUMP Charge pump oscillator AM15034v1 Microstepping The driver is able to divide the single step into up to 16 microsteps. Stepping mode can be programmed by the STEP_SEL parameter in the STEP_MODE register (Table 22). -
Page 21: Automatic Full-Step And Boost Modes
L6482 Functional description 6.4.1 Automatic Full-step and Boost modes When motor speed is greater than a programmable full-step speed threshold, the L6482 switches automatically to Full-step mode; the driving mode returns to microstepping when motor speed decreases below the full-step speed threshold. The switching between the microstepping and Full-step mode and vice versa is always performed at an electrical position multiple of π/4 (Figure 6... -
Page 22: Absolute Position Counter
Functional description L6482 Figure 7. Automatic Full-step switching in Boost mode peak Phase A peak Phase B Full-Step Microstepping Microstepping (2N+1) x π /4 (2N+1) x π/4 AM15037v1 Absolute position counter An internal 22-bit register (ABS_POS) records all the motor motions according to the selected step mode;... -
Page 23: Motor Control Commands
L6482 Functional description Figure 8. Speed profile in infinite acceleration/deceleration mode SPEED Programmed Programmed number of microsteps maximum speed time time Indexing mode Constant speed mode AM15038v1 Motor control commands The L6482 can accept different types of commands: ● constant speed commands (Run, GoUntil, ReleaseSW) ●... -
Page 24: Motion Commands
Functional description L6482 performing the minimum path (minimum physical distance) or forcing a direction (see Figure 10). Performed motor motion is compliant to programmed speed profile boundaries (acceleration, deceleration, minimum and maximum speed). Note that with some speed profiles or positioning commands, the deceleration phase can start before the maximum speed is reached. -
Page 25: Stop Commands
L6482 Functional description 6.7.4 Stop commands A stop command forces the motor to stop. Stop commands can be sent anytime. The SoftStop command causes the motor to decelerate with a programmed deceleration value until the MIN_SPEED value is reached and then stops the motor keeping the rotor position (a holding torque is applied). -
Page 26: Internal Oscillator And Oscillator Driver
Functional description L6482 Internal oscillator and oscillator driver The control logic clock can be supplied by the internal 16-MHz oscillator, an external oscillator (crystal or ceramic resonator) or a direct clock signal. These working modes can be selected by EXT_CLK and OSC_SEL parameters in the CONFIG register (see Table 35). -
Page 27: Overcurrent Detection
L6482 Functional description register (Section 9.1.18). When the external clock source is selected, the device continues to work with the integrated oscillator for t milliseconds and then the clock management extosc system switches to the OSCIN input. Figure 12. OSCIN and OSCOUT pin configuration EXT_CLK = "0"... -
Page 28: Undervoltage Lockout (Uvlo)
Functional description L6482 Figure 13. Overcurrent detection-principle scheme LOGIC CORE OCD_HSxx HVGxx Voltage Comparator BLANKING OUTxx CURRENT LVGxx THRESHOLD Voltage Comparator OCD_LSxx GNDx AM15043v1 The overcurrent detection comparators are disabled, in order to avoid wrong voltage measurements, in the following cases: ●... -
Page 29: Vs Undervoltage Lockout (Uvlo_Adc)
L6482 Functional description Table 9. UVLO thresholds UVLOVAL Low-side gate driver supply turn-off threshold 6.3 V 10 V CCthOff Low-side gate driver supply turn-on threshold 6.9 V 10.4 V CCthOn High-side gate driver supply turn-off threshold 5.5 V 8.8 V (ΔV BOOTthOff High-side gate driver supply turn-on threshold... -
Page 30: Reset And Standby
Functional description L6482 Table 10. Thermal protection summarizing table State Set condition Release condition Description TH_STATUS Normal Normal operation state Temperature warning: operation is Warning j > Tj(WRN)Set j > Tj(WRN)Rel not limited High temperature protection: the Bridge shutdown gates are turned off and the gate j >... -
Page 31: Programmable Gate Drivers
L6482 Functional description switch input events do not cause interrupts and the switch status information is at the user’s disposal (Table Section 9.1.20). The switch input can be used by GoUntil and ReleaseSW commands as described in Section 9.2.10 Section 9.2.11. -
Page 32: Deadtime And Blanking Time
Functional description L6482 Figure 15. Gate driving currents Gate discharged Gate charged gate gate Gate Current Gate turn-on Gate turn-off AM15045v1 The gate current can be set to one of the following values: 4, 8, 16, 24, 32, 64 and 96 mA through the IGATE parameter in the GATECFG1 register (see Section 9.1.18). -
Page 33: Supply Management And Internal Voltage Regulators
L6482 Functional description 6.18 Supply management and internal voltage regulators The L6482 integrates two linear voltage regulators: the first one can be used to obtain gate driver supply starting from a higher voltage (e.g. the motor supply one). Its output voltage can be set to 7.5 V or 15 V according to the VCCVAL bit value (CONFIG register). -
Page 34: Busy/Sync Pin
Functional description L6482 6.19 BUSY/SYNC pin This pin is an open drain output which can be used as busy flag or synchronization signal according to the SYNC_EN bit value (STEP_MODE register) (see Section 9.1.17). 6.20 FLAG pin By default, an internal open drain transistor pulls the FLAG pin to ground when at least one of the following conditions occurs: ●... -
Page 35: Phase Current Control
L6482 Phase current control Phase current control The L6482 performs a new current control technique, named predictive current control, allowing the device to obtain the target average phase current. This method is described in detail in Section 7.1. Furthermore, the L6482 automatically selects the better decay mode in order to follow the current profile. -
Page 36: Auto-Adjusted Decay Mode
Phase current control L6482 As shown in Figure 17, the system is able to center the triangular wave on the desired reference value, improving dramatically the accuracy of the current control system: in fact the average value of a triangular wave is exactly equal to the middle point of each of its segment and at steady-state the predictive current control tends to equalize the duration of the tSENSE and the tPRED time. -
Page 37: Figure 19. Adaptive Decay - Fast Decay Tuning
L6482 Phase current control Figure 19. Adaptive decay - fast decay tuning fast decay: Tfast = TOFF_FAST/8 fast decay: Tfast = TOFF_FAST/2 Ton > TON_MIN Tfast = TOFF_FAST/2 fast decay (*): Tfast = TOFF_FAST/4 reference current (*)Note: starting from 2 fast decay the system combines fast and slow decay during the OFF phase. -
Page 38: Auto-Adjusted Fast Decay During The Falling Steps
Phase current control L6482 Figure 20. Adaptive decay - switch from normal to slow+fast decay mode and vice versa fast decay fast decay switch to fast + slow decay mode reference current Time OFF,SLOW OFF,FAST FAST Target current is increased (raising step) system returns to slow decay mode and t vaule is halved FAST... -
Page 39: Torque Regulation (Output Current Amplitude Regulation)
L6482 Phase current control Figure 21. Fast decay tuning during the falling steps Falling step fast decay: = FALL_STEP/4 FALL Falling step fast decay: = FALL_STEP/2 FALL reference current fast decay: = FALL_STEP/2 FALL Time AM15052v1 Torque regulation (output current amplitude regulation) The phase currents are monitored through two shunt resistors (one for each power bridge) connected to the respective sense pin (see Figure... -
Page 40: Figure 22. Current Sensing And Reference Voltage Generation
Phase current control L6482 Figure 22. Current sensing and reference voltage generation Peak reference DAC To gate To gate drivers TVAL_X or ADCIN drivers Load Microstepping DAC Microstep To gate To gate drivers drivers V ref To current control logic SENSEX R sense AM15047v1... -
Page 41: Serial Interface
L6482 Serial interface Serial interface The integrated 8-bit serial peripheral interface (SPI) is used for a synchronous serial communication between the host microprocessor (always master) and the L6482 (always slave). The SPI uses chip select (CS), serial clock (CK), serial data input (SDI) and serial data output (SDO) pins. -
Page 42: Figure 24. Daisy Chain Configuration
Serial interface L6482 Figure 24. Daisy chain configuration DEV 1 HOST DEV 2 HOST SPI signals Byte N Byte N-1 Byte 1 Byte N DEV N Byte N Byte N-1 Byte 1 Byte N AM15054v1 42/73 Doc ID 023768 Rev 1... -
Page 43: Programming Manual
L6482 Programming manual Programming manual Register and flag description Table 11 shows the user registers available (a detailed description can be found in the respective paragraphs): Table 11. Register map Address Reset Reset Len. Remarks Register name Register function [bit] [Hex] value ABS_POS... -
Page 44: Abs_Pos
Programming manual L6482 Table 11. Register map (continued) Address Reset Reset Len. Remarks Register name Register function [bit] [Hex] value Gate driver = 4 mA, t = 125 ns, no gate GATECFG1 R, WH configuration boost Gate driver GATECFG2 = 125 ns, t = 125 ns R, WH BLANK... -
Page 45: Mark
L6482 Programming manual with the step mode selected in the STEP_MODE register in order to avoid a wrong microstep value generation (Section 9.1.17); otherwise the resulting microstep sequence is incorrect. Any attempt to write the register when the motor is running causes the command to be ignored and the NOTPERF_CMD flag to rise (Section 9.1.21). -
Page 46: Dec
Programming manual L6482 9.1.6 The DEC register contains the speed profile deceleration expressed in step/tick (format unsigned fixed point 0.40). In order to convert the DEC value in step/s , the following formula can be used: Equation 3 – ⋅ step/s ------------------------------- tick... -
Page 47: Fs_Spd
L6482 Programming manual The available range is from 0 to 976.3 step/s with a resolution of 0.238 step/s. Any attempt to write the register when the motor is running causes the NOTPERF_CMD flag to rise. 9.1.9 FS_SPD The FS_SPD register contains the following parameters: Table 14. -
Page 48: T_Fast
Programming manual L6482 Table 15. Torque regulation by TVAL_HOLD, TVAL_ACC, TVAL_DEC and TVAL_RUN registers TVAL_X [6..0] Output current amplitude 7.8 mV 15.6 mV 992.2 mV 9.1.11 T_FAST The T_FAST register contains the maximum fast decay time (TOFF_FAST) and the maximum fall step time (FALL_STEP) used by the current control system (Section 7.2 Section 7.3 for details):... -
Page 49: Toff_Min
L6482 Programming manual Table 18. Minimum on-time TON MIN [6..0] Time 0.5 µs 1 µs 63.5 µs 64 µs Any attempt to write to the register when the motor is running causes the command to be ignored and the NOTPERF_CMD to rise (see Section 9.1.21). -
Page 50: Adc_Out
Programming manual L6482 9.1.14 ADC_OUT The ADC_OUT register contains the result of the analog-to-digital conversion of the ADCIN pin voltage. Any attempt to write to the register causes the command to be ignored and the NOTPERF_CMD flag to rise (see Section 9.1.21). -
Page 51: Step_Mode
L6482 Programming manual 9.1.16 STEP_MODE The STEP_MODE register has the following structure: Table 22. STEP_MODE register Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 SYNC_EN SYNC_SEL STEP_SEL 1. When the register is written this bit must be set to 1. The STEP_SEL parameter selects one of five possible stepping modes: Table 23. -
Page 52: Alarm_En
Programming manual L6482 Table 24. SYNC output frequency STEP_SEL (f is the full-step frequency) 2· f 2· f 2· f 2· f 2· f 2· f 4· f 4· f 4· f 4· f 4· f 8· f 8· f 8·... -
Page 53: Gatecfg1
L6482 Programming manual Table 26. ALARM_EN register (continued) ALARM_EN bit Alarm condition Thermal warning UVLO ADC UVLO Unused Switch turn-on event 7 (MSB) Command error 9.1.18 GATECFG1 The GATECFG1 register has the following structure: Table 27. GATECFG1 register Bit 15 Bit 14 Bit 13 Bit 12... -
Page 54: Gatecfg2
Programming manual L6482 Table 29. TCC parameter Constant current time TCC [4..0] [ns] ⇓ ⇓ ⇓ ⇓ ⇓ ⇓ 3625 3750 3750 3750 The TBOOST parameter defines the duration of the overboost phase during gate turn-off (Section 6.15). Table 30. TBOOST parameter TBOOST Turn-off boost time... -
Page 55: Config
L6482 Programming manual The TCC parameter defines the deadtime duration between the gate turn-off and the opposite gate turn-on sequences (Section 6.16). Table 32. TDT parameter TDT [4..0] Deadtime [ns] ⇓ ⇓ ⇓ ⇓ ⇓ ⇓ 3875 4000 The TBLANK parameter defines the duration of the blanking of the current sensing comparators (stall detection and overcurrent) after each commutation (Section 6.16). -
Page 56: Table 35. Oscillator Management
Programming manual L6482 Table 35. Oscillator management EXT_CLK OSC_SEL[2..0] Clock source OSCIN OSCOUT Internal oscillator: 16 MHz Unused Unused Supplies a 2-MHz Internal oscillator: 16 MHz Unused clock Supplies a 4-MHz Internal oscillator: 16 MHz Unused clock Supplies an 8-MHz Internal oscillator: 16 MHz Unused clock... -
Page 57: Table 37. Overcurrent Event
L6482 Programming manual The OC_SD bit sets if an overcurrent event causes or not the bridges to turn off; the OCD flag in the status register is forced low anyway: Table 37. Overcurrent event OC_SD Overcurrent event Bridges shutdown Bridges do not shutdown The VCCVAL bit sets the internal V regulator output voltage. -
Page 58: Status
Programming manual L6482 Table 41. Switching period (continued) TSW [4..0] Switching period 124 µs (8 kHz) Any attempt to write the CONFIG register when the motor is running causes the command to be ignored and the NOTPERF_CMD flag to rise (see Section 9.1.21). -
Page 59: Table 44. Status Register Th_Status Bits
L6482 Programming manual TH_STATUS bits indicate the current device thermal status (Section 6.12): Table 44. STATUS register TH_STATUS bits TH_STATUS Status Normal Warning Bridge shutdown Device shutdown UVLO, UVLO_ADC, OCD, CMD_ERROR, SW_EVN and TH_STATUS bits are latched: when the respective conditions make them active (low or high) they remain in that state until a GetStatus command is sent to the IC. -
Page 60: Application Commands
Programming manual L6482 Application commands The command summary is given in Table Table 47. Application commands Command Mnemonic Command binary code Action [7..5] [4] [2..1] [0] Nothing SetParam(PARAM,VALUE) 000 [PARAM] Writes VALUE in PARAM register GetParam(PARAM) [PARAM] Returns the stored value in PARAM register Run(DIR,SPD) DIR Sets the target speed and the motor direction Puts the device in Step-clock mode and imposes DIR... -
Page 61: Command Management
L6482 Programming manual 9.2.1 Command management The host microcontroller can control motor motion and configure the L6482 through a complete set of commands. All commands are composed by a single byte. After the command byte, some bytes of arguments should be needed (see Figure 25). -
Page 62: Nop
Programming manual L6482 9.2.2 Table 48. Nop command structure Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 From host Nothing is performed. 9.2.3 SetParam (PARAM, VALUE) Table 49. SetParam command structure Bit 7 Bit 6 Bit 5 Bit 4... -
Page 63: Run (Dir, Spd)
L6482 Programming manual This command reads the current PARAM register value; PARAM is the respective register address listed in Table The command response is the current value of the register (most significant byte first). The number of bytes composing the command response depends on the length of the target register (see Table 11). -
Page 64: Move (Dir, N_Step)
Programming manual L6482 command argument and can by changed by a new StepClock command without exiting Step-clock mode. Events that cause bridges to be forced into high impedance state (overtemperature, overcurrent, etc.) do not cause the device to leave Step-clock mode. The StepClock command does not force the BUSY flag low. -
Page 65: Goto_Dir (Dir, Abs_Pos)
L6482 Programming manual This command can be given only when the previous motion command has been completed (BUSY flag released). Any attempt to perform a GoTo command when a previous command is under execution (BUSY low) causes the command to be ignored and the NOTPERF_CMD flag to rise (Section 9.1.21). -
Page 66: Releasesw (Act, Dir)
Programming manual L6482 If the SW_MODE bit of the CONFIG register is set low, the external switch turn-on event causes a HardStop interrupt instead of the SoftStop one (Section 6.14 Section 9.1.20). This command keeps the BUSY flag low until the switch turn-on event occurs and the motor is stopped. -
Page 67: Resetpos
L6482 Programming manual The GoMark command produces a motion to the MARK position performing the minimum path. Note that, this command is equivalent to the “GoTo (MARK)” command. If a motor direction is mandatory, the GoTo_DIR command must be used. The GoMark command keeps the BUSY flag low until the MARK position is reached. -
Page 68: Hardstop
Programming manual L6482 This command can be given anytime and is immediately executed. This command keeps the BUSY flag low until the motor is stopped. 9.2.17 HardStop Table 63. HardStop command structure Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1... -
Page 69: Getstatus
L6482 Programming manual 9.2.20 GetStatus Table 66. GetStatus command structure Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 from host STATUS MSByte to host STATUS LSByte to host The GetStatus command returns the Status register value. The GetStatus command resets the STATUS register warning flags. -
Page 70: Package Mechanical Data
Package mechanical data L6482 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. -
Page 71: Figure 29. Htssop38 Footprint
L6482 Package mechanical data Figure 29. HTSSOP38 footprint Doc ID 023768 Rev 1 71/73... -
Page 72: Revision History
Revision history L6482 Revision history Table 68. Document revision history Date Revision Changes 08-Oct-2012 Initial release. 72/73 Doc ID 023768 Rev 1... - Page 73 No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein.
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