IBM EM78P312N Specification
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IBM EM78P312N Specification

IBM EM78P312N Specification

Ibm 8-bit microcontroller green product specification
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EM78P312N
8-BIT
Microcontroller
Green Product
Specification
D
. V
1.0
OC
ERSION
ELAN MICROELECTRONICS CORP.
October 2006

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  • Page 1 EM78P312N 8-BIT Microcontroller Green Product Specification ERSION ELAN MICROELECTRONICS CORP. October 2006...
  • Page 2 Trademark Acknowledgments: IBM is a registered trademark and PS/2 is a trademark of IBM. Windows is a trademark of Microsoft Corporation. ELAN and ELAN logo © 2006 by ELAN Microelectronics Corporation Copyright All Rights Reserved Printed in Taiwan The contents of this specification are subject to change without further notice. ELAN Microelectronics assumes no responsibility concerning the accuracy, adequacy, or completeness of this specification.

  • Page 3: Table Of Contents

    Contents General Description...1 Features ...1 Pin Assignment ...1 Pin Description...2 Function Description...3 Functional Block Diagram ... 3 Operating Registers ... 4 Special Purpose Registers ... 19 CPU Operation Mode ... 23 AD Converter... 24 Time Base Timer and Keytone Generator ... 26 UART (Universal Asynchronous Receiver/Transmitter)...
  • Page 4 Contents 5.14 Reset and Wake-up... 42 5.14.1 Reset ... 42 5.14.2 Wake-up from Sleep Mode ... 43 5.14.3 Wake-up from Idle Mode ... 43 5.14.4 The Status of RST, T, and P of the Status Register ... 48 5.15 Interrupt ... 49 5.16 Oscillator...

  • Page 5: General Description

    General Description The EM78P312N is an 8-bit microprocessor with low-power, high-speed CMOS technology and high noise immunity. It has an on-chip 4K×13-bits Electrical One Time Programmable Read Only Memory (OTP-ROM). multi-protection bits to prevent intrusion of user’s OTP memory codes. Seven Option bits are also available to meet user’s requirements.

  • Page 6: Pin Description

    EM78P312N 8-Bit Microcontroller Pin Description Table 1 Symbol Pin No. Type − OSCI OSCO /RESET P60~P67 19~26 P70~P73 15~18 P80~P81 12~13 P90~P97 4~11 − − OTP Programming Pins ACLK DATAIN DINCK PGMB 2 • Power supply Crystal type: Crystal input terminal...

  • Page 7: Function Description

    Oscillation 8-level stack Generation (13 bit) Reset Interrupt Control Register Interrupt Circuit Ext INT1 Ext INT3 Ext INT5 Fig. 5-1 Functional Block Diagram EM78P312N 8-Bit Microcontroller Start-up Ext. Timer UART TBKTC Ain 0~7 • 3 TX RX Sin Sout Keytone...

  • Page 8: Operating Registers

    EM78P312N 8-Bit Microcontroller 5.2 Operating Registers Register Bank 0 Address R0/ IAR R1/ TCC R2/ PC R3/ SR R4/ RSR Port 6 Port 7 Port 8 TC2CR/ ADDL Port 9 Reserved TC4CR TC4D ISFR0 ISFR1 ISFR2 16 Byte Common Register...
  • Page 9 For an interrupt trigger, the program ROM will jump to individual interrupt vector at Page 0. The CPU will store ACC, R3 status and R5 PAGE automatically, it will restore after instruction RETI. Product Specification (V1.0) 10.03.2006 (This specification is subject to change without further notice) EM78P312N 8-Bit Microcontroller • 5...
  • Page 10 EM78P312N 8-Bit Microcontroller 000 : PAGE0 0000~03FF 001 : PAGE1 0400~07FF 010 : PAGE2 0800~0BFF 011 : PAGE3 0C00~0FFF 100 : PAGE4 1000~13FF 101 : PAGE5 1400~17FF 110 : PAGE6 1800~1BFF 111 : PAGE7 1C00~1FFF R3 (Status Register) Bit 7...
  • Page 11 General Purpose Register Bank (Address 20H ~ 3FH) Bit 5 Bit 4 Bit 3 Program Memory Page [Address] Page 0 [0000~03FF] Page 1 [0400~07FF] Page 2 [0800~0BFF] Page 3 [0C00~0FFF] EM78P312N 8-Bit Microcontroller Bit 2 Bit 1 Bit 0 RSR2 RSR1 RSR0 Bank 0...
  • Page 12 EM78P312N 8-Bit Microcontroller R6 (Port 6 I/O Data Register) Bit 7 Bit 6 Bit 7 ~ Bit 0 ( P67 ~ P60 ) : 8-bit Port 6 I/O data register User can use IOC6 register to define each bit whether input or output.
  • Page 13 Pulse Width Modulation output Bit 5 Bit 4 Bit 3 TC4D5 TC4D4 TC4D3 TC4D2 Bit 5 Bit 4 Bit 3 INT3F INT3R EM78P312N 8-Bit Microcontroller Resolution Max. Time ( Fosc=8M ) ( Fosc=8M ) 256μS 65mS 16μS 4μS 1μS 255μS 500nS 127.5μS...
  • Page 14 EM78P312N 8-Bit Microcontroller RE (Interrupt Status Flag Register 1) Bit 7 Bit 6 EXIF5 TCIF2 Bit 7 ( EXIF5 ) : External Interrupt Flag (/INT5), flag cleared by software. Bit 6 ( TCIF2 ) : 16-bit Timer/Counter 2 Interrupt Flag, flag cleared by software.
  • Page 15 Bit 5 Bit 4 Bit 3 TC3DA5 TC3DA4 TC3DA3 Bit 5 Bit 4 Bit 3 TC3DB5 TC3DB4 TC3DB3 EM78P312N 8-Bit Microcontroller Bit 2 Bit 1 Bit 0 Resolution Max. time ( Fc=8M ) ( Fc=8M ) 512μS 131.1mS 128μS 32.6mS 16μS...
  • Page 16 EM78P312N 8-Bit Microcontroller Bank 1 R8 TC2CR/ ADDL (Timer/Counter 2 Control Register, AD Low 2 bits Data Buffer) Bit 7 Bit 6 ADD1 ADD0 Bit 7 ~ Bit 6 ( ADD1 ~ ADD0 ) : AD low 2-bit data buffer Bit 4 ( TC2M ) : Timer/Counter 2 mode select TC2M = “0”...
  • Page 17 ADIS0 Bit 5 Bit 4 Bit 3 ADE5 ADE4 ADE3 Bit 5 Bit 4 Bit 3 ADD7 ADD6 ADD5 EM78P312N 8-Bit Microcontroller Max. Operating Frequency (Fc) 1MHz 4MHz 8MHz Analog Input Pin Bit 2 Bit 1 Bit 0 ADE2 ADE1...
  • Page 18 EM78P312N 8-Bit Microcontroller Bank 1 RE TBKTC (TBT/Keytone Control) Bit 7 Bit 6 TCK1 Bit 7 ( TEN ) : Keytone enable control TEN = “0” : Disable TEN = “1” : Enable Bit 6 ~ Bit 5 ( TCK1 ~ TCK0 ) : Keytone Output Clock Source Select...
  • Page 19 (This specification is subject to change without further notice) BRATE1 BRATE0 Bit 5 Bit 4 Bit 3 SBIM1 SBIM0 UINVEN TC2CK0 Bit 5 Bit 4 Bit 3 PRERR OVERR EM78P312N 8-Bit Microcontroller Baud Rate e.g. Fc=8MHz Fc/13 38400 Fc/26 19200 Fc/52 9600 Fc/104 4800 Fc/208 2400 Fc/416...
  • Page 20 EM78P312N 8-Bit Microcontroller Bit 6 ( EVEN ) : Select parity check EVEN = “0” : Odd parity EVEN = “1” : Even parity Bit 5 ( PRE ) : Enable parity addition PRE = “0” : Disable PRE = “1” : Enable Bit 4 ( PRERR ) : Parity error flag.
  • Page 21 (This specification is subject to change without further notice) Clock Source BRS0 ( Normal, Idle ) External clock (/SCK pin) External clock (/SCK pin) buffer. Bit 5 Bit 4 Bit 3 EM78P312N 8-Bit Microcontroller Max. Transfer Rate ( Fc = 8MHz ) 0.95Kbit/s 3.8Kbit/s 7.6Kbit/s 30.5Kbit/s 122Kbit/s 244Kbit/s...
  • Page 22 EM78P312N 8-Bit Microcontroller Bit 2 ~ Bit 1 ( SPIM1 ~ SPIM0) : SPI Transfer Mode Select TC2CK1 Bit 0 ( RBF ) : Set to 1 by Buffer Full Detector, and cleared to 0 automatically when reading data from the SPID register. RBF bit will be cleared by hardware when enabling SPI.

  • Page 23: Special Purpose Registers

    /PHE72 Bit 5 Bit 4 Bit 3 /PLE73 /PLE72 Bit 5 Bit 4 Bit 3 WDTP1 WDTP0 WDTE WDTP0 EM78P312N 8-Bit Microcontroller Bit 2 Bit 1 Bit 0 /PHE71 /PHE70 Bit 2 Bit 1 Bit 0 /PLE71 /PLE70 Bit 2...
  • Page 24 EM78P312N 8-Bit Microcontroller Bit 2 ( PSR2 ) ~ Bit 0 ( PSR0 ) : TCC prescaler bits PSR2 IOC6 ~ IOC9 − I/O Port Control Register "1" puts the relative I/O pin into high impedance, while "0" defines the relative I/O pin as output.
  • Page 25 ENI + EXIE5 (IMR2) Bit 5 Bit 4 Bit 3 VOF[2] VOF[1] VOF[0] Bit 5 Bit 4 Bit 3 ADIE EXIE3 EM78P312N 8-Bit Microcontroller Digital Noise Edge Reject Falling Rising or Falling 15/Fc, 63/Fc Rising or Falling or 7/Fc Rising/Falling Bit 2...
  • Page 26 EM78P312N 8-Bit Microcontroller Bit 1 ( SPIE ) : SPI Interrupt enable bit. SPIE = “0” : disable SPIF interrupt SPIE = “1” : enable SPIF interrupt Bit 0 ( TCIE3 ) : Timer/Counter 3 Interrupt enable bit. TCIE3 = “0” : disable TCIF3 interrupt TCIE3 = “1”...

  • Page 27: Cpu Operation Mode

    /SLEEP pin wake up Idle Set SIS = 0, execute SLEP instruction Interrupt Frequency Turn on Idle Turn off EM78P312N 8-Bit Microcontroller Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 − − SIS=1 + SLEP Sleep Mode CPU : Halts...

  • Page 28: Ad Converter

    EM78P312N 8-Bit Microcontroller In Sleep mode, the internal oscillator is turned off and all system operation is halted. Sleep mode is released by /SLEEP pin (level sensitive or edge sensitive can be set by System Control Register (SCR) Bit 0 (REM)). After a warm-up period, the next instruction will be executed which is after the Sleep mode start instruction.
  • Page 29 ADCK0 and ADCK1 select the conversion time (Tct), in terms of instruction cycles. This allows the MCU to run at maximum frequency without sacrificing accuracy of A/D conversion. For the EM78P312N, the conversion time per bit is about 4μs. Table 5 shows the relationship between Tct and the maximum operating frequencies.

  • Page 30: Time Base Timer And Keytone Generator

    EM78P312N 8-Bit Microcontroller 5.6 Time Base Timer and Keytone Generator Registers for AD Converter Circuit R_BANK Address Name Bit 7 Bank 1 0X0E Bank 0 0x0F 0x0F Data Output Fosc/2 Fosc/2 Fosc/2 Fosc/2 TCK1:0 The Keytone output can generate 50% duty pulse for driving a piezo-electric buzzer.
  • Page 31 Source Clock TBTEN TBT Interrupt Product Specification (V1.0) 10.03.2006 (This specification is subject to change without further notice) TBTEN TBKTC Fig. 5-8 TBT Configuration Fig. 5-9 Time Base Timer Timing Chart EM78P312N 8-Bit Microcontroller Falling Edge Detector Interrupt • 27...

  • Page 32: Uart (Universal Asynchronous Receiver/Transmitter)

    EM78P312N 8-Bit Microcontroller 5.7 UART (Universal Asynchronous Receiver/Transmitter) Registers for UART Circuit R_BANK Address Name Bit 7 Bank 2 0X05 Bank 2 0X06 Bank 2 0X07 Bank 2 0X08 Bank 2 0X09 Bank 0 0x0F 0x0F UINVEN In Universal Asynchronous Receiver Transmitter (UART), each transmitted or received character is individually synchronized by framing it with a start bit and stop bit.

  • Page 33: Uart Mode

    7 bits DATA START 7 bits DATA START 8 bits DATA START 8 bits DATA START 9 bits DATA START Fig. 5-12 UART Mode EM78P312N 8-Bit Microcontroller Idle state Parity STOP (mark) 1 bit 1 bits STOP Parity STOP STOP...

  • Page 34: Receiving

    EM78P312N 8-Bit Microcontroller 3. Start transmitting. 4. Serially transmitted data are transmitted in the following order from the TX pin. 5. Start bit: one “0” bit is output. 6. Transmit data: 7, 8 or 9 bits data are output from the LSB to the MSB.

  • Page 35: Spi (Serial Peripheral Interface)

    SHIFT Register SPID (8 bits) DORD BRS2~0 BRS2~0 /SS enable Prescaler 4, 16, 64, 256,1024 Edge Select TC1/2 Fig. 5-13 SPI Block Diagram EM78P312N 8-Bit Microcontroller Bit 3 Bit 2 Bit 1 Bit 0 BRS0 DORD SPIM1 SPIM0 SPID3 SPID2 SPID1...

  • Page 36: Serial Clock

    EM78P312N 8-Bit Microcontroller 5.8.1 Serial Clock Six internal clocks can be selected by setting BRS0 ~ BRS2 and the clock output to the outside from /SCK (P70) pin. The External clock can also be used and connected to /SCK (P70) pin.
  • Page 37 (This specification is subject to change without further notice) shift start shift start shift finish a0 a1 a2 a3 a4 a5 a6 a7 b0 b1 b2 b3 b4 b5 b6 b7 read data Fig. 5-15 Receive Mode (8-bit, 1 word) EM78P312N 8-Bit Microcontroller read data • 33...
  • Page 38 EM78P312N 8-Bit Microcontroller SPIS /SCK pin SO pin SI pin SPIF SPID write data (d) Multiple Device Connect (/SS) When selecting external clock for transfer clock source, the /SS function can be used. This pin (/SS) will be active when the /SS function is enabled, else the /SS pin is a general purpose I/O.

  • Page 39: Timer/Counter 2

    TC2D5 TC2D4 EXIF5 ADIF TCIF2 INT1NR INT0EN INT3ES1 INT3ES0 EXIE5 ADIE TCIE2 Window 16-bit Up-counter TC2S TCR2H TCR2L EM78P312N 8-Bit Microcontroller Bit 3 Bit 2 Bit 1 Bit 0 TC2S TC2CK2 TC2CK1 TC2CK0 TC2D11 TC2D10 TC2D9 TC2D8 TC2D3 TC2D2 TC2D1...

  • Page 40: Timer Mode

    EM78P312N 8-Bit Microcontroller 5.9.1 Timer Mode In Timer mode, counting up is performed using the internal clock. When the contents of the up-counter matched with the TCR2 (TCR2H+TCR2L), then interrupt is generated and the counter is cleared. Counting up resumes after the counter is cleared.

  • Page 41: Timer/Counter 3

    Bit 5 Bit 4 TC3S TC3CK1 TC3CK0 TC3DA5 TC3DA4 TC3DB5 TC3DB4 EXIF5 TCIF2 ADIF INT0EN INT3ES1 EXIE5 TCIE2 ADIE EM78P312N 8-Bit Microcontroller counter match clear Bit 3 Bit 2 Bit 1 Bit 0 TC3M TC3DA3 TC3DA2 TC3DA1 TC3DA0 TC3DB3 TC3DB2 TC3DB1...

  • Page 42: Timer Mode

    EM78P312N 8-Bit Microcontroller Rising Edge Falling Detector INT3ES TC3M TC3 pin fc/2 fs/2 fc/2 fs/2 fc/2 TC3S TC2CK TC3CR Fig. 5-22 Configuration of Timer/Counter3 5.10.1 Timer Mode In Timer mode, counting up is performed using the internal clock. When the contents of the up-counter matched with the TCR3DA, then interrupt is generated and the counter is cleared.

  • Page 43: Timer/Counter 4

    Bit 4 TC4FF1 TC4FF0 TC4S TC4CK2 TC4CK1 TC4CK0 TC4D7 TC4D6 TC4D5 TC4D4 EXIF5 TCIF2 ADIF EXIE5 TCIE2 ADIE EM78P312N 8-Bit Microcontroller FE FF0 FF (Overflow) Overflow Capture Bit 3 Bit 2 Bit 1 Bit 0 TC4M1 TC4M0 TC4D3 TC4D2 TC4D1...

  • Page 44: Timer Mode

    EM78P312N 8-Bit Microcontroller fc/2 fc/2 8-bit Up-counter fc/2 TC4 pin TC4CK TC4S TC4CR 5.11.1 Timer Mode In Timer mode, counting up is performed using the internal clock. When the contents of the up-counter matched with the TCR4, then interrupt is generated and the counter is cleared.

  • Page 45: Pwm Mode

    18 ms (default). The WDT can also be used as a timer to generate an interrupt at fixed interval. Product Specification (V1.0) 10.03.2006 (This specification is subject to change without further notice) Overflow Match Overwrite Fig. 5-26 Timing Chart for PWM Mode EM78P312N 8-Bit Microcontroller Overflow Match Shift 1 Period • 41...

  • Page 46: I/O Ports

    EM78P312N 8-Bit Microcontroller 5.13 I/O Ports The I/O registers, Port 6, Port 7, Port 8, and Port 9 are bi-directional tri-state I/O ports. Each I/O pin can be defined as “input” or “output” pin by the I/O control register (IOC6 ~ IOC9).

  • Page 47: Wake-Up From Sleep Mode

    This will reset the controller and run the program at address zero. (3) WDT time out This will reset the controller and run the program at address zero. Product Specification (V1.0) 10.03.2006 (This specification is subject to change without further notice) EM78P312N 8-Bit Microcontroller • 43...
  • Page 48 EM78P312N 8-Bit Microcontroller Table 6. Summary of the Initialized Values for Registers Address Name Reset Type Bit Name Power-on 0x06 IOC6 /RESET and WDT time out Wake-up from Sleep, Idle mode Bit Name Power-on 0x07 IOC7 /RESET and WDT time out...
  • Page 49 TC4S TC4CK2 TC4CK1 TC4CK0 TC4M1 TC4D7 TC4D6 TC4D5 TC4D4 TC4D3 TC4D2 TC4D1 TC4D0 INT3F INT3R EXIF5 TCIF2 ADIF EXIF3 UERRIF RBFF TBEF TBIF EM78P312N 8-Bit Microcontroller Bit 2 Bit 1 Bit 0 TC4M0 WDTIF EXIF0 TCIF4 SPIF TCIF3 EXIF1 TCIF0...
  • Page 50 EM78P312N 8-Bit Microcontroller Register Bank 1 Addres Name Reset Type Bit Name Power-on 0x05 TC3CR /RESET and WDT time out Wake-up from Sleep, Idle mode Bit Name Power-on 0x06 TC3DA /RESET and WDT time out Wake-up from Sleep, Idle mode...
  • Page 51 SPIS SPID17 SPID16 SPID15 SPID14 SPID13 SPID12 SPID11 SPID10 /PHE81 /PHE80 /PHE63 /PHE62 /PHE61 /PHE60 /PLE81 /PLE80 /PLE63 /PLE62 /PLE61 /PLE60 /PHE73 /PHE72 /PHE71 /PHE70 /PLE73 /PLE72 /PLE71 /PLE70 EM78P312N 8-Bit Microcontroller Bit 2 Bit 1 Bit 0 Bit 2...

  • Page 52: The Status Of Rst, T, And P Of The Status Register

    EM78P312N 8-Bit Microcontroller General Purpose Registers Address Name Reset Type Bit Name 0x10 Power-on /RESET and WDT time out 0x3F Wake-up from Sleep, Idle mode Legend: “×” = not used “u” = unknown or don’t care 5.14.4 The Status of RST, T, and P of the Status Register The values of T and P are used to verify the event that triggered the processor to wake up.

  • Page 53: Interrupt

    Oscillator Power-on Reset Voltage Detector WDTE /RESET 5.15 Interrupt The EM78P312N has 15 interrupts (9 external, 6 internal) as listed below: Table 9 Interrupt Vector Interrupt Source Internal / External Internal External Internal External Internal Internal Internal Internal UART Receive error...

  • Page 54: Oscillator

    High frequency oscillator 5.16.2 Crystal Oscillator/Ceramic Resonators (Crystal) EM78P312N has a clock generator. i.e. fc (high frequency) which can be driven by an external clock signal through the OSCI pin. In most applications, Pin OSCI and Pin OSCO can be connected with a crystal or ceramic resonator to generate oscillation.
  • Page 55 Table12. Capacitor Selection Guide for Crystal Oscillator or Ceramic Resonator Oscillator Type Ceramic Resonator Crystal Oscillator OSCI EM78P312N EM78P809N Product Specification (V1.0) 10.03.2006 (This specification is subject to change without further notice) OSCI OSCO EM78P312N EM78P809N Fig. 5-29 Crystal/Resonator Circuit...

  • Page 56: External Rc Oscillator Mode

    EM78P312N 8-Bit Microcontroller OSCI EM78P809N EM78P312N Fig. 5-32 Crystal/Resonator-Parallel Mode Circuit 5.16.3 External RC Oscillator Mode For applications that do not need very precise timing calculation, the RC oscillator offers a lot of cost savings. Nevertheless, it should be noted that the frequency of the RC oscillator is influenced by the supply voltage, the values of the resistor (Rext), the capacitor (Cext), and even by the operation temperature.

  • Page 57: Code Option Register

    The values are for design reference only. 5.17 Code Option Register The EM78P312N has one CODE option word that is not part of the normal program memory. The option bits cannot be accessed during normal program execution. Code Option Register and Customer ID Register arrangement distribution:...

  • Page 58: Customer Id Register

    Any microcontroller is not guaranteed to start and operate properly before the power supply maintains at its steady state. The EM78P312N has a built-in Power On Voltage Detector (POVD) with a detecting level of 2.1V. It will work well if V (10 ms or less).

  • Page 59: Residue-Voltage Protection

    /RESET EM78P312N EM78P809N Fig. 5-34 External Power-Up Reset Circuit 5.18.2 Residue-Voltage Protection When battery is replaced, device power (V The residue-voltage may trip below V cause a poor power-on reset. Fig.35 and Fig. 36 show how to build the residue-voltage protection circuit.

  • Page 60: Instruction Set

    EM78P312N 8-Bit Microcontroller 5.19 Instruction Set Each instruction in the instruction set is a 13-bit word divided into an OP code and one or more operands. Normally, all instructions are executed within one single instruction cycle (one instruction consists of 2 oscillator periods), unless the program counter is changed by instruction "MOV R2,A", "ADD R2,A", or by instructions of arithmetic or...
  • Page 61 A, k 1Bkk A, k 1Ckk RETL 1Dkk A, k 1Fkk A, k 1E8k PAGE 1E9k BANK EM78P312N 8-Bit Microcontroller Status Operation Affected A → R None 0 → A 0 → R R-A → A Z,C,DC R-A → R Z,C,DC R-1 →...

  • Page 62: Absolute Maximum Ratings

    EM78P312N 8-Bit Microcontroller Absolute Maximum Ratings 6.1 Absolute Maximum Ratings Items Temperature under bias Storage temperature Input voltage Output voltage Operating Frequency (2clk) 6.2 Recommended Operating Conditions Vss = 0V Symbol Parameter Supply Voltage Crystal: VDD 4.5 to 5.5V Crystal: VDD 2.5 to 5.5V 58 •...

  • Page 63: Electrical Characteristics

    Pull-high active, input pin at VSS Pull-high active, input pin at VDD All input and I/O disabled pins at VDD, output pin floating enabled VDD=5V, /RESET= 'High', Fc=8MHz, CLKS="0", output pin floating, WDT enabled EM78P312N 8-Bit Microcontroller Min. Typ. Max. Unit − 1170 15.5 28.5 μA...
  • Page 64 EM78P312N 8-Bit Microcontroller Ta= 25 ° C, VDD= 3.0V ± 5%, VSS= 0V Symbol Parameter Crystal: 2.5V to VDD ERC: VDD = 3V Input High Threshold VIHRC Voltage (Schmitt Trigger) IRC1 Sink current Input Low Threshold VILRC Voltage (Schmitt Trigger)
  • Page 65 = 2.5 to 5.5V Ta=25°C = 2.5 to 5.5V Ta=25°C =VAREF=5.0V, VASS =0.0V =VAREF=5.0V, VASS =0.0V − =VAREF=5.0V, VASS =0.0V =VAREF=5.0V, VASS =0.0V =VAREF=5.0V, VASS =0.0V =VAREF=5.0V, VASS =0.0V, RL=10KΩ =5.0V±0.5V EM78P312N 8-Bit Microcontroller Min. Typ. Max. Unit − − − VASS VAREF 1000 μA...

  • Page 66: Ac Electrical Characteristic

    EM78P312N 8-Bit Microcontroller 7.2 AC Electrical Characteristic Ta=- 40 ° C ~ 85 ° C, VDD=5V ± 5%, VSS=0V Symbol Parameter Dclk Input CLK duty cycle Crystal type (high frequency) Instruction cycle time Tins (CLKS="0") RC type Ttcc TCC input period...

  • Page 67: Timing Diagram

    2.0V for logic "1",and 0.8V for logic "0". RESET Tim ing (CLK="0") /RESET TCC Input Tim ing (CLKS="0") Tins Product Specification (V1.0) 10.03.2006 (This specification is subject to change without further notice) TEST POINTS Instruction 1 Tdrh Ttcc EM78P312N 8-Bit Microcontroller Executed • 63...

  • Page 68: Appendix

    EM78P312N 8-Bit Microcontroller A Package Types: OTP MCU EM78P312NP EM78P312NK EM78P312NAK EM78P312NM EM78P312NS Y/S/J ： Green product does not contain hazardous substances. The third edition of Sony SS-00259 standard. Pb content should be less than 100ppm. Pb content to fit in with Sony spec.

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