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L9800 Datasheet(PDF) 44 Page - STMicroelectronics

Part # L9800
Description  Automotive 8-channel LS driver
PDF  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9800 Datasheet(HTML) 44 Page - STMicroelectronics

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Table 18. Register addressing space
Field name
Type
Bit
offset
Bit
width
Reset
value
Reset
source
Description
CHIP_ID, 0x00
CHIP_ID
RO
0
8
00100010
X
8-bit chip identifier
CFG_0, 0x01
NU
RO
6
2
0x00
X
Not used
NRES_N_EN
RW
5
1
NPOR, CFG_1.RST,
VDD_UV
0 (default): NRES pin masked
1: NRES pin NOT masked (not cleared after an NRES
reset)
ACTIVE TO
SLEEP DIS SWR
RW
4
1
0x00
NPOR, NRES pin,
CFG_1.RST, VDD_UV
0 (default): SW reset required for transition ACTIVE to
SLEEP
1: SW reset NOT required for transition ACTIVE to
SLEEP
RESERVED
RW
3
1
0x00
NPOR, NRES pin,
CFG_1.RST, VDD_UV
Reserved
VS_UV_MASK
RW
2
1
0x00
NPOR, NRES pin,
CFG_1.RST, VDD_UV
0 (default): VBATT UV not masked
1: VBATT UV masked but STA_1 diag bit still working
DIS_EN
RW
1
1
0x00
NPOR, NRES pin,
CFG_1.RST bit, VDD_UV
0: (default) DIS pin masked
1: DIS pin not masked
NRES_EN
RW
0
1
0x00
NPOR, NRES pin,
CFG_1.RST bit, VDD_UV
0 (default): NRES pin masked
1: NRES pin not masked
CFG_1, 0x02
RST
WO
7
1
0x00
NPOR, NRES pin,
CFG_1.RST bit, VDD_UV
Reset:
0: (default) normal operation
1: Execute reset command (self-clearing)
ACT
RW
6
1
0x00
NPOR, NRES pin,
CFG_1.RST bit, VDD_UV
Active mode:
0: (default) normal operation or device leaves active mode
1: device enters active mode
NU
RO
2
4
0x00
X
PWM_DIV_LED
RW
0
2
0x00
NPOR, NRES pin,
CFG_1.RST bit, VDD_UV
Clock division factor for PWM LED generator PWM
frequency:
00 (default): PWM_FRQ = 122 Hz
01: PWM_FRQ = 244 Hz
10: PWM_FRQ = 488 Hz
11: PWM_FRQ = 976 Hz
CFG_2, 0x03
NU
RO
6
2
0x00
X
RESERVED
RW
4
2
0x00
NPOR, NRES pin,
CFG_1.RST bit, VDD_UV
Reserved
FR_ADJ
RW
2
2
0x00
NPOR, NRES pin,
CFG_1.RST bit, VDD_UV
PWM generator and LED frequency adjustment bit (15%
of selected frequency):
00: no frequency adjustment
01: -15% on selected frequency
10: +15% on selected frequency
11: no frequency adjustment
L9800
Serial peripheral interface (SPI)
DS14041 - Rev 2
page 44/55



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