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L9660 Datasheet(PDF) 43 Page - STMicroelectronics

Part # L9660
Description  Quad squib driver ASIC for safety application
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9660 Datasheet(HTML) 43 Page - STMicroelectronics

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L9660
Functional description
48
Monitor mode 2
Monitor mode main information:
Current limit measurement of channels
The SPI message definition for MOSI commands and MISO responses in Monitor Mode 2
are defined below.
Bits [D9:D7].
Used when sending the MOSI command to select the channel to be
measured. The MISO response echoes the MOSI command.
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
MOSI Command for Monitor Mode 2
1
1
P
CLR
0
1
Current
Measurement
Channel Select
0
0
0
0
0
0
0
MISO Response for Monitor Mode 2
1
1
P
0
0
1
Current
Measurement
Channel
Current Measurement Data
Table 28. MOSI monitor mode 2 Bit definition
Bit
MOSI command
MISO response
State
Description
D15
1
Mode bits
See above for state
D14
1
Mode bits
See above for state
D13
Odd parity – Includes all 16 bits
Odd Parity – Includes all 16 bits
D12
0
Keep timer measurements
See above for state
1
Clear “current measurement time” stored
on the register of channel selected by
D9:D7
See above for state
D11
0
Monitor mode selection bits
See above for state
D10
1
Monitor mode selection bits
See above for state
D9
Channel selected for current
measurement
See Table 29
Internal Stored channel selections bits
D8
D7
D6:D0
0
-
Current measurement of selected
channel
Table 29. Current measurement channel selections
Channel
Bit D9
Bit D08
Bit D07
0
0
0
0
1
0
0
1
2
0
1
0
3
0
1
1



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