Texas Instruments TRIS TMS37122 Manuals

Manuals and User Guides for Texas Instruments TRIS TMS37122. We have 1 Texas Instruments TRIS TMS37122 manual available for free PDF download: Reference Manual

Texas Instruments TRIS TMS37122 Reference Manual (73 pages)

TIRIS Automotive Devices Analog Front End IC

Brand: Texas Instruments | Category: Computer Hardware | Size: 0 MB

Table of Contents
4
General Features
7
Figure 1: TSSOP Package (Top View)
7
Circuit Description
8
Figure 2: System Arrangement of 3D-Analog Front End IC TMS37122
8
Figure 3: Typical 3D-AFE Application Including Battery Backup Function
10
Table 1: Description of the Device's Pins
11
Chapter 2: Electrical Description
13
General
15
Figure 4: Block Schematic of TMS37122
16
Figure 5: Standard Battery Supply - Schematic
17
Power Supply
17
VBAT Supply
17
Standard Battery Supply
17
Rechargeable Battery Supply
17
Figure 6: Schematic for Rechargeable Battery Supply
18
Battery Backup Supply
18
Figure 7: Schematic for Battery Backup Supply
19
VCL Supply
19
Backup Mode
19
Test Mode
20
Power Supply
21
Figure 8: Test Arrangement with Digital Interface Test Box and PC
21
Power-On-Reset
22
Figure 9: Schematic of Reset Flow
22
Limiter Circuits
23
Figure 10: TMS37122 Limiter Circuits
23
Wake Detector
24
Figure 11: Block Schematic of Wake Detector
24
End-Of-Burst Detector
25
Pulse Position Demodulator
25
Figure 12: EOB Detector and Pulse Position Modulator Function
25
Control Unit
26
Figure 13: Overall State Diagram of Control Unit
27
Figure 14: Initialization State Diagram of TMS37122
28
Off Mode
28
Standby Mode
28
Init Mode
28
Active Mode
28
Control Unit
29
Figure 15: Control Unit Timing Diagram
29
Wake Pattern Detection
29
Figure 16: Wake Pattern Detection State Diagram
30
Transparent Mode
30
FSK Modulator
31
Figure 17: State Diagram of Transparent Mode
31
Configuration Memory
32
Figure 18: State Diagram of LF Transmission Mode
32
Memory Organisation
32
Figure 19: Memory Organisation
33
Table 2Default Function Configuration
33
Default Memory Content
33
Figure 20: Default Memory Content
34
Table 3: Wake Sensitivity VWAKEA/1 Options
35
Configuration Options
35
Wake Sensitivity VWAKEA/1
35
Figure 21:VWAKEA Sensitivity Diagram
36
Passive Start Sensitivity VWAKEB/1/2/3
36
Figure 22: System Schematic for Indoor/Outdoor Detection
37
Table 4: Passive Start Sensitivity Options
37
Figure 23: VWAKEB SENSITIVITY Diagram
38
Pulse Position Demodulator Threshold
38
Table 5: Counter Definition for Pulse Position Demodulation
39
Wake Pattern Detection Flag 'NO_WAKE
39
Write Distance Expander 2 Flag 'NO_WDE2
39
Write Distance Expander 3 Flag 'NO_WDE3
39
Passive Entry Wake Pattern
40
Passive Start Wake Pattern
40
10Telegram Duration 'C_TELEGR
40
Table 6: Counter Definition for Pulse Position Demodulation
41
11Wake Pattern Waiting Time 'C_WAIT
41
Table 7: Wake Pattern Waiting Time Options
42
Memory Programming
42
Figure 24: Timing Diagram for Test Mode Ptx04
43
Memory Read
43
Resonant Circuit Trimming
44
Figure 25: Timing Diagram for Test Mode Ptx07
44
Resonance Frequency Measurement
45
Figure 26Timing Diagram for Test Mode Ptx18
46
Figure 27: Timing Diagram for Test Mode Ptx14
47
Trimming EEPROM Programming
47
Modulation Frequency Check
47
Chapter 3: Application
48
Passive Entry Function
49
Figure 28: Passive Entry Wake Pattern Detection
50
Figure 29: Passive Entry Challenge/Response Timing
51
Passive Start Function
52
Figure 30: Passive Start Wake Pattern Detection
53
Battery Backup Function
54
Figure 31: Timing Diagram for Battery Backup Function
55
Immobilizer Function
56
Anti-Collision Function
56
Figure 32: Timing Diagram of Anti-Collision Function
57
Chapter 4: Product Specification Data
58
Absolute Maximum Ratings
59
Recommended System Operating Conditions
60
Base Station - Test Station Conditions
60
Identification Device Conditions
60
Recommended Operating Conditions for IC
61
Identification Device Antennas
61
Resonant Circuit Capacitor
61
Charge Capacitor
61
General
63
IC Characteristics over Operating Free-Air Temperature Range
63
General IC Characteristics
63
Input Capacitances
63
Modulation Capacitor
63
Trimming Capacitors and Switches
64
CLKA Watchdog Circuit
64
Clock Regenerator/ Pluck Logic
65
RF Limiter
65
VCL Limiter
65
Voltage Regulator
65
Supply and Reference Currents
66
Wake Detector
66
Figure 33: Measurement System:timing, Dynamic Current & Sensitivity
67
CLKA Sensitivity
70
EOBA Sensitivity
70
AGC Amplifier
70
Control Interface
72
Clock Supervision
72
Pulse Position Demodulator
73
Electrostatic Discharge
73
Package
73

Texas Instruments Categories

Motherboard Control Unit Microcontrollers Computer Hardware Calculator

More Texas Instruments Manuals

Texas Instruments TRIS TMS37122 Manuals

Texas Instruments TRIS TMS37122 Reference Manual (73 pages)

Table of Contents

Related Products

Texas Instruments Categories