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L9678P 데이터시트(PDF) 161 Page - STMicroelectronics

부품명 L9678P
상세설명  Automotive user configurable airbag IC
PDF  203 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P 데이터시트(HTML) 161 Page - STMicroelectronics

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L9678P, L9678P-S
System voltage diagnostics
202
Proper scaling is necessary for various voltage measurements. The divider ratios vary by
measurement and are summarized by function in the table below.
011010
0
52
$34
Unused
011010
1
53
$35
Unused
011011
0
54
$36
SSxy Voltage ch. 0
SS01
011011
1
55
$37
SSxy Voltage ch. 1
SS01
011100
0
56
$38
SSxy Voltage ch. 2
SS23
011100
1
57
$39
SSxy Voltage ch. 3
SS23
011101
0
58
$3A
Unused
011101
1
59
$3B
Unused
011110
0
60
$3C
Unused
011110
1
61
$3D
Unused
011111
0
61
$3E
Unused
011111
1
63
$3F
Unused
100000
0
64
$40
Unused
100000
1
65
$41
Unused
100001
0
66
$42
VRESDIAG
VRESDIAG
100001
1
67
$43
VDD5
VDD5
100010
0
68
$44
VDD3V3
VDD3V3
100010
1
69
$45
ISOK output voltage
ISOK
100011
0
70
$46
SF0 voltage
SF0
100011
1
71
$47
SF1 voltage
SF1
100100
0
72
$48
SF2 voltage
SF2
100100
1
73
$49
SF3 voltage
SF3
1. The DC sensor resistance measurement can only be addressed through DIAGCRTL_A command. Results are available
through DIAGCTRL_A and DIAGCTRL_B, where ADCRES_A will contain DCSI and ADCRES_B will contain DCSV.
Table 11. Diagnostics control register (DIAGCTRLx) (continued)
ADC Request (ADCREQx)
Voltage measurement selection
ADC Results (ADCRESx)
Bit [6:0]
Hex
Bit [9:0]
Table 12. Diagnostics divider ratios
Measurements
Divider Ratio
15:1
10:1
7.125:1
7:1
4:1
1:1
VER
X
ERBOOST
X
VSF
X
SSxy
X



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