33812 Datasheet, PDF (4/25 Pages) Freescale Semiconductor, Inc – SMALL ENGINE CONTROL IC

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