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L9177 Datasheet(PDF) 9 Page - STMicroelectronics

Part # L9177
Description  Peripheral on chip for low end engine control
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9177 Datasheet(HTML) 9 Page - STMicroelectronics

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L9177
Block diagram and pin description
48
14
TACH
Tachometer driver output
O
PWR
15
ILS_TACH Tachometer driver input
I
SIGNAL
16
GND_O2H O2 sensor heater ground
GND
PWR
17
INO2H
O2 sensor heater input
I
SIGNAL
18
RESET
Reset signal to the micro
O
SIGNAL
19
IN_REL2
Relay 2 parallel control input
I
SIGNAL
20
IN_REL1
Relay 1 parallel control input
I
SIGNAL
21
REL2
Relay 2 driver output
O
PWR
22
GND_P_1
Power ground relay 1-2
O
PWR
23
REL1
Relay 1 driver output
O
PWR
24
REL3
Relay 3 driver output
O
SIGNAL
25
GND_P_2
Power ground for lamp
GND
PWR
26
LAMP
Lamp driver output
O
PWR
27
SO
SPI data out
O
SIGNAL
28
SI
SPI data in
I
SIGNAL
29
SCK
SPI serial clock
I
SIGNAL
30
CS
SPI chip select
I
SIGNAL
31
KEY
Key signal
I
SIGNAL
32
INJ1
Injector 1driver power output
O
PWR
33
IN1
Injector 1 driver input command
I
SIGNAL
34
GND_INJ1 Injector 1 ground
GND
PWR
35
GND_INJ2 Injector 2 ground
GND
PWR
36
IN2
Injector 2 driver input command
I
SIGNAL
37
INJ2
Injector 2 driver power output
O
PWR
38
KL_TX
K-Line TX digital IN
I
SIGNAL
39
KL_RX
K-Line RX digital OUT
O
SIGNAL
40
KL_LINE
K-Line
I/O
PWR
41
VDD
5 V voltage regulator output
O
PWR
42
PWM
Logic Input to set Stepper Motor Speed
I
SIGNAL
43
VDD_SB
5 V standby voltage regulator output
O
PWR
44
VB
Battery line to bridge 2
I
PWR
45
OUTD
Output bridge 2
O
PWR
46
OUTC
Output bridge 2
O
PWR
Table 2. Pin function (continued)
Pin #
Pin name
Description
I/O
type
Class



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