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
This output is a 5.0 V logic level that is high when KEYSW is high. It is only
low when KEYSW is low. It can also be controlled via the SPI. The BATSW
output may not be present in a different package but it’s function can be read
by the SPI.
29
BATSW
Output
Battery Switch
5.0 V logic level input from the MCU to control the injector 1 driver output (Can
also be controlled via the SPI)
31
33
34
INJIN1
IGNIN1
O2HIN
Input
Input
Input
Injector Driver Input 1
Ignition Input 1
5.0 V logic level input from MCU controlling the ignition coil # 1 current flow
and spark. (Can also be controlled via the SPI)
5.0 V logic level input used to turn on and off the O2HOUT driver. The
O2HOUT driver can also be turned on and off via the SPI if this pin is not
present in a different package.
O2 Sensor Heater
Input
5.0 V logic level input from the MCU to control the relay 2 driver output
ROUT2. The ROUT2 driver can also be turned on and off via the SPI if this
pin is not present in a different package.
35
36
37
RIN2
RIN1
Input
Input
Input
Relay Driver Input 2
Relay Driver Input 1
Key Switch Input
5.0 V logic level input from the MCU to control the relay 1 driver output
ROUT1. The ROUT1 driver can also be turned on and off via the SPI if this
pin is not present in a different package.
The Key Switch Input is a VPWR level signal that indicates that the Key is
inserted and turned to the ON/OFF position. In the ON position the
(KEYSW = VBAT) the IC is enabled and BATSW = HIGH (Relay 2 ON if
programmed in SPI). In the OFF position the IC is in Sleep mode, only when
the PWREN bit in the SPI register is also low.
KEYSW
Ground connection for injector low side driver. Must be tied to VPWR ground.
38
40
41
42
43
44
INJGND2
RGND1
Ground
Ground
Injector Driver
Ground
Ground connection for ROUT 1 low side driver. Must be tied to VPWR ground.
ROUT1 Power
Ground
Low Side Relay Driver Output # 1 driven by the SPI input command or RIN1
logic input
ROUT1
Output
Relay Driver 1 Output
Ground connection for injector 1 low side driver. Must be tied to VPWR
ground.
INJGND1
INJOUT1
ISO9141
Ground
Injector Driver 1
Ground
Low side driver output for injector 1 driven by the SPI input or by parallel input
INJIN1
Output
Injector Driver 1
Output
ISO9141 pin is VPWR level IN/OUT signal which is connected to an external
ECU tester that uses the ISO9141 protocol. The output is open drain and the
Input is a ratiometric VPWR level threshold comparator.
Input/Output
ISO9141 K-Line
Bidirectional Serial
Data Signal
Voltage feedback from collector of ignition # 1 driver IGBT through 10:1
voltage divider (9R:1R)
45
46
IGNFB1
Input
Feedback from
Collector 1
Output to gate of IGBT or GPGD for ignition # 1
IGNOUT1
Output
Ignition Output 1
33813
Analog Integrated Circuit Device Data
Freescale Semiconductor
7
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