mc33812 Freescale Semiconductor, Inc, mc33812 Datasheet - Page 4

• Manufacturer Part Number: mc33812
• Description: Multifunctional Ignition And Injector Driver
• Manufacturer: Freescale Semiconductor, Inc

Table 1. 33812 Pin Definitions
4
33812
PIN CONNECTIONS
Pin
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
VCCSENS
Pin Name
IGNOUTH
IGNOUTL
VCCREF
ISO9141
IGNSUP
RELFLT
LAMPIN
IGNFLT
RESET
INJFLT
IGNFB
VPWR
IGNIN
INJIN
MTX
RIN
Supply Input
Input/Output ISO9141 K-Line Bidirectional
Function
Output
Output
Output
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
Pin
VCCSENS
IGNOUTH
IGNOUTL
VCC Reference Base drive
Main Voltage Supply Input
VCCREF
ISO9141 MCU Data Input
Voltage Sense from VCC
ISO9141
IGNSUP
RELFLT
LAMPIN
IGNFLT
Feedback from Source
RESET
Ignition Output Supply
INJFLT
Reset Output to MCU
Injector Parallel Input
Ignition Parallel Input
IGNFB
VPWR
Ignition Output High
LAMP Parallel Input
IGNIN
Relay Parallel Input
Ignition Output Low
INJIN
Serial Data Signal
RIN
Formal Name
Injector Fault
Ignition Fault
Relay Fault
Figure 4. 33812 Pin Connections
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN CONNECTIONS
GND
Low side output to drive Gate/Base of IGBT/Bipolar Darlington
High side output to drive Gate/Base of IGBT/Bipolar Darlington
Tie to +5 V for Darlington, tie to the V
Voltage feedback from source of Ignition driver transistor through 10:1
voltage divider
The ISO9141 pin is V
Tester using ISO9141 Protocol.The Output is Open drain and the Input is
a ratiometric V
Feedback to internal VCC regulator from external pass transistor
Base drive voltage for external PNP pass transistor
VPWR is the main voltage supply Input for the device. Connected to +12
volt battery (It should have reverse battery protection and transient
suppression.)
Logic Level Reset signal used to reset the MCU when the watchdog circuit
times out, during under voltage condition on VCC and for initial power up
and power down
Logic Level output to MCU indicating any fault in the injector circuit.
Logic Level output to MCU indicating any fault in the relay circuit.
Logic Level output to MCU indicating any fault in the ignition circuit.
Logic Level input from the MCU to control the injector driver output
Logic Level Parallel input to activate RELAY output, ROUT
Logic Level Parallel input to activate the malfunction indicator lamp output,
LAMP
Logic Level Input from MCU controlling the ignition coil current flow and
spark.
Input logic level ISO9141 data from the MCU to the ISO9141 IN/OUT pin
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
PWR
level threshold comparator
PWR
TEST3
TEST2
TEST1
WD_INH
N.C.
INJOUT
PGND1
DGND
LAMPOUT
PGND2
ROUT
N.C.
TM_EN
WDRFSH
MRX
MTX
level IN/OUT signal connected to external ECU
Description
Analog Integrated Circuit Device Data
PWR
supply for IGBT output device
Freescale Semiconductor