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L9679P bảng dữ liệu(PDF) 211 Page - STMicroelectronics

tên linh kiện L9679P
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L9679P bảng dữ liệu(HTML) 211 Page - STMicroelectronics

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L9679P
System voltage diagnostics
271
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)
19
18 17 16 15 14 13 12 11 10 9 8 7
6543210
MOSI
xxxxxx
x x x
ADCREQ_A[6:0]
MISO NEWDATA_A
0
0
ADCREQ_A[6:0]
ADCRES_A[9:0]



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