33812 Datasheet, PDF (5/25 Pages) Freescale Semiconductor, Inc – SMALL ENGINE CONTROL IC

PIN CONNECTIONS
Table 1. 33812 Pin Definitions
Pin
Pin Name
Pin
Function
18
MRX
Output
19 WDRFSH
Input
Formal Name
Low Side Driver Output
Watchdog Refresh
20
TM_EN
Input
21
N.C.
Unused
22
ROUT
Output
23
PGND2
Ground
24 LAMPOUT Output
Test Mode Enable
-------
Relay Driver Output
Power Ground 2
Warning Lamp Output
25
DGND
Ground
26
PGND1
Ground
27
INJOUT
Output
28
N.C.
Unused
29
WD_INH
Input
Supply Ground
Power Ground 1
Injector Driver Output
-------
Watch Dog Inhibit
30
TEST1
Input
31
TEST2
Input
32
TEST3
Input
EP
GND
Ground
Test 1
Test 2
Test 3
Substrate Ground
Description
Output logic level ISO9141 data to the MCU from the ISO9141 IN/OUT pin
Logic Level input from MCU to refresh the watchdog circuit to prevent
RESET
Used by Freescale test engineering, tie to Gnd in operation
Unused pin, leave open
Low side relay driver output driven by parallel input RIN
Ground for RELAY driver output
Low side driver output for MIL (warning lamp) driven by parallel input
LAMPIN
Tied to ground plane, used for ground for all low power signals
Ground for INJOUT injector driver output
Low side driver output for Injector driven by parallel input INJIN
Unused pin, leave open
Normally tied to GND, If tied high through a pull-up, it inhibits RESET from
a watchdog time-out
MUST be tied to GND.
MUST be tied to GND.
MUST leave OPEN.
Should be tied to DGND.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33812
5