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L9679E Datasheet(PDF) 90 Page - STMicroelectronics

Part # L9679E
Description  Automotive battery cut-off circuit and airbag system expansion IC
PDF  127 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679E Datasheet(HTML) 90 Page - STMicroelectronics

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Requests are sent to the L9679E IC via the ADC measurement Registers (ADCREQx) as shown in
Table 14. Diagnostics control register (DIAGCTRLx). All diagnostics results are available on the ADCRESx
registers, when addressed by the related ADCREQx register (e.g. data requested by ADCREQA would be written
to ADCRESA).
Table 14. Diagnostics control register (DIAGCTRLx)
ADC Request (ADCREQx)
Voltage Measurement
Selection
ADC Results
(ADCRESx)
Bit[6:0]
Hex
Bit[9:0]
0
0
0
0
0
0
0
0x00
0
0
0
0
0
0
1
0x01
ADC ground reference
VADC_GROUND
0
0
0
0
0
1
0
0x02
ADC full scale reference
VADC_FULLSCALE
0
0
0
0
0
1
1
0x03
0
0
0
0
1
0
0
0x04
0
0
0
0
1
0
1
0x05
0
0
0
0
1
1
0
0x06
Squib/Pyroswitch
measurement loop
selected
Voutx
0
0
0
0
1
1
1
0x07
Internal reference Voltage
VBG1
0
0
0
1
0
0
0
0x08
Internal reference monitor
Voltage
VBG2
0
0
0
1
0
0
1
0x09
0
0
0
1
0
1
0
0x0A
Temperature
Measurement
TEMP
0
0
0
1
0
1
1
0x0B
0
0
0
1
1
0
0
0x0C
0
0
0
1
1
0
1
0x0D
0
0
0
1
1
1
0
0x0E
0
0
0
1
1
1
1
0x0F
0
0
1
0
0
0
0
0x10
0
0
1
0
0
0
1
0x11
0
0
1
0
0
1
0
0x12
0
0
1
0
0
1
1
0x13
0
0
1
0
1
0
0
0x14
0
0
1
0
1
0
1
0x15
0
0
1
0
1
1
0
0x16
0
0
1
0
1
1
1
0x17
0
0
1
1
0
0
0
0x18
0
0
1
1
0
0
1
0x19
0
0
1
1
0
1
0
0x1A
0
0
1
1
0
1
1
0x1B
0
0
1
1
1
0
0
0x1C
0
0
1
1
1
0
1
0x1D
0
0
1
1
1
1
0
0x1E
0
0
1
1
1
1
1
0x1F
L9679E
System voltage diagnostics
DS12485 - Rev 8
page 90/127



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