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L9679P bảng dữ liệu(PDF) 212 Page - STMicroelectronics

tên linh kiện L9679P
Giải thích chi tiết về linh kiện  Automotive advanced airbag for mid/high end applications and cut-off battery IC
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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L9679P bảng dữ liệu(HTML) 212 Page - STMicroelectronics

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System voltage diagnostics
L9679P
212/279
DS11627 Rev 7
15
System voltage diagnostics
L9679P has an integrated dedicated circuitry to provide diagnostic feedback and processing
of several inputs. These inputs are addressed with an internal analog multiplexer and made
available through the SPI digital interface with the Diagnostic Data commands. In order to
avoid saturation of high voltage internal signals, an internal voltage divider is used.
Figure 68. ADC MUX
The diagnostics circuitry is activated by four SPI Diagnostics Control commands
(DIAGCTRLx); each of them can address all the available nodes to be monitored, except for
what mentioned in Table 18.
DIAGCTRLx SPI command bit fields are structured in the following way:
DIAGCTRL_A (ADDRESS HEX 3A)
GAPG2104161155PS
19
18 17 16 15 14 13 12 11 10 9 8 7
6
5
4
3
2
1
0
MOSI
x
x
x
x
x
x x x x
ADCREQ_A[6:0]
MISO NEWDATA_A
0
0
ADCREQ_A[6:0]
ADCRES_A[9:0]



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