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L9659 Datasheet(PDF) 46 Page - STMicroelectronics

Part # L9659
Description  Octal squib driver ASIC for safety application
PDF  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9659 Datasheet(HTML) 46 Page - STMicroelectronics

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Functional description
L9659
46/51
Doc ID 022048 Rev 2
All other combinations for MOSI bits D9:D7 will produce an error response of 0xD000.
Bits [D6:D0]
Current measurement data of selected squib channel. Bit weight is
nominally 25µs for a total measurement time 3.175ms.
Monitor mode 3
Monitor mode main information:
●
Status of FENx Function - FENx pin OR’d with Internal FENx latch
●
Status of current for each channel
The SPI message definition for MOSI commands and MISO responses in Monitor Mode 3
are defined below.
4
1
0
0
5
1
0
1
6
1
1
0
7
1
1
1
Table 29.
Current measurement channel selections (continued)
Channel
Bit D9
Bit D08
Bit D07
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
MOSI Command for Monitor Mode 3
1
1
P
0
1
0
CFS
0
0
0
0
0
0
0
0
0
MISO Response for Monitor Mode 3
1
1
P
0
1
0
CFS
POR
STAT
CF7
CF6
CF5
CF4
CF3
CF2
CF1
CF0
Table 30.
MOSI monitor mode 3 bit definition
Bit
MOSI command
MISO response
State
Description
D15
1
Mode Bits
See above for state
D14
1
See above for state
D13
-
Odd Parity – Includes all 16 bits
Odd Parity – Includes all 16 bits
D12
0
-
See above for state
D11
1
-
See above for state
D10
0
-
See above for state
D09
Status Type
0 = Current limit status
1 = FEN function status
0 = current measurement status reported
in bit D7:D0
1 = FEN function status reported in D7:D0
D08
0
-
POR status
D7:D0
0
-
Current measurement status of channels
or FEN status as indicated below



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