EVB Block Diagram
5
EVB Block Diagram
MC33812 SMALL ENGINE CONTROL EVB
VBAT
VPWR
BLOCK DIAGRAM
12V
+
-
Reverse Battery
and Transient
Protection
LED
VPWR
IGNITION
VCC
SUPPLY
(+5V)
VCC
LED
8
VCC
(+5V)
JUMPER
OUTPUTS
VPWR
IGNITION
IGNSUP 3
IGNOUTH 1
VCC PASS
TRANSISTOR
6
7
VPWR
VCCSENS
VCCREF
IGNFB
IGNOUTL
4
2
IGBT and
Feedback
divider
LED
VPWR
IGNITION COIL OUTPUT
SOFT
LAMP
1
VCC
LAMPOUT 24
LED
VPWR
LAMP OUTPUT
WD_INH
29
WD_INH
JUMPER
3
INJECTOR
LED
VPWR
INPUTS
INJOUT
27
INJECTOR OUTPUT
USB/SPI Dongle
1
USB ON
LED
Connector
2
WDRFSH
CNTL0
DATA4
DATA3
19
17
15
MC33812
WDRFSH
MTX
LAMPIN
ROUT
22
RELAY
LED
VPWR
RELAY OUTPUT
15
DATA2
DATA1
DATA0
16
14
16
13
RIN
IGNIN
INJIN
9
RESETB
INJFLT 10
11
RELFLT
RESET LED 6
INJ. FAULT LED
REL. FAULT LED
RESETB
INJFLT
RELFLT
N/C
32
TEST3
31 TEST2
IGNFLT
MRX
12
18
IGN. FAULT LED
MRX STATE LED
1
3
1
IGNFLT
MRX
GND
30 TEST1
20
TM_EN
ISO9141
5
VPWR
LIN_PWR
ISO 9141
CONNECTOR
GNDs
23, 25, 26, EP
Figure 1. EVB Block Diagram
4
2
6
Freescale Semiconductor
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