Table 2. 33813 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 24.
Pin
Function
Pin
Pin Name
Formal Name
Description
Positive input to the O2 heater current sense differential amplifier
6
O2HSENSP
Input
O2 Heater Current
Sense Input Positive Used to measure current in of O2 heater driver MOSFET source resistor, if
used.
5.0 V Logic Level Output from conditioned VRS differential inputs VRSP,
VRSN
7
8
9
VRSOUT
VRSP
Output
Input
VRS Conditioned
Output
The VRSP and VRSN form a differential input for the Variable Reluctance
Sensor attached to the crankshaft toothed wheel.
Variable Reluctance
Sensor Positive Input
The VRSP and VRSN form a differential input for the Variable Reluctance
Sensor attached to the crankshaft toothed wheel.
VRSN
Input
Variable Reluctance
Sensor Negative
Input
The Chip Select input pin is an active low signal sent by the MCU to indicate
that the device is being addressed.
10
11
CSB
Input
SPI Chip Select
VPWR is the main voltage supply input for the device. Connected to a 12 Volt
battery (Should have reverse battery protection and adequate transient
protection.)
VPWR
Supply Input Main Voltage Supply
Input
The SCLK input pin is used to clock in and out the serial data on the SI and
SO pins while being addressed by the CSB.
12
SCLK
Input
SPI Clock Input
The SI input pin is used to receive serial data into the device from the MCU.
Base drive for external PNP pass transistor
13
14
SI
Input
SPI Data Input
VPPREF
Output
VPP Reference Base
Drive
Ground pin, return for all voltage supplies
15
16
17
GND
SO
Ground
Output
Supply
Ground
The SO output pin is used to transmit serial data from the device to the MCU.
SPI Data Output
5.0 Volt supply output for MCU VCC. This output supplies the VCC voltage
for 5.0 Volt MCUs. It is short-circuit and over-current protected.
VCC
VCC Supply
Protected Output
Feedback to internal VPP 6.5 Volt regulator from external pass transistor
18
19
20
VPPSENS
RESETB
VPROT
Input
Output
Output
Voltage Sense from
VPP
5.0 V Logic level reset signal used to reset the MCU during under and over-
voltage conditions and for initial power-up, down and watchdog timeouts
RESETB Output to
MCU
The VPROT Output is a protected 5.0 Volt output that tracks the VCC voltage
but isolates the VCC output against shorts to ground and to battery. It is
intended to supply sensors which are located off of the ECU board.
Sensor Supply
Protected Output
Low side driver output for MIL (warning lamp) driven by SPI input command
21
22
LAMPOUT
RGND2
Output
WarningLampOutput
Ground connection for ROUT 2 low side driver. Must be tied to VPWR
Ground.
Ground
ROUT2 Power
Ground
Low side relay driver output # 2 driven by SPI input command or RIN2 logic
input
23
ROUT2
Output
Relay Driver 2 Output
For future expansion
For future expansion
24
25
26
N.C.
N.C.
No Connect
No Connect
Output
Unused pin
Unused pin
This pin provides the low side drive for a tachometer gauge or alternatively as
a SPI controlled low side driver, or oscillator output.
TACHOUT
Tachometer output
Output 5.0 V logic level ISO9141 data to the MCU from the ISO9141 IN/OUT
pin
27
28
MRX
MTX
Output
Input
Low Side Driver
Output
Input 5.0 V logic level ISO9141 data from the MCU to the ISO9141 IN/OUT
pin
ISO9141 MCU Data
Input
33813
Analog Integrated Circuit Device Data
Freescale Semiconductor
6
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一文带你了解TPS5430资料手册分析：参数介绍、引脚配置说明
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