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L9659 データシート(PDF) 35 Page - STMicroelectronics

部品番号 L9659
部品情報  Octal squib driver ASIC for safety application
PDF  51 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9659 データシート(HTML) 35 Page - STMicroelectronics

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L9659
Functional description
Doc ID 022048 Rev 2
35/51
Bits [D9:D8]
Bits are used to set the period of the FEN latch timer. The L9659 has
4 independent timers. A valid FENx input will start the pulse stretch
timer. These bits will set the timer duration. These values default to
‘00’ after a POR event.
Deployment commands
The deployment mode is used to activate the drivers. Two consecutive commands are
required to activate the drivers. Any combination of channels can be fired as long as the
prerequisite conditions are met as indicated in the previous section.
The SPI message definition for MOSI commands and MISO responses in Deployment Mode
are defined below.
D9
-
FEN latch time
00 = 0ms (default)
01 = 128ms
10 = 256ms
11 = 512ms
Internal Stored Value FEN latch bits
D8
D7 – D0
0
-
See above
Table 17.
Configuration mode 2
Bit
MOSI command
MISO response
State
Description
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
MOSI Command for Deployment Mode 1
0
1
P
1
1
0
0
1
0
0
0
0
Arming Channel Select
MISO Response for Deployment Mode 1
0
1
P
1
1
0
0
1
0
0
0
0
Armed Channels
MOSI Command for Deployment Mode 2
0
1
P
0
0
0
0
0
0
0
0
0
Firing Channel Select
MISO Response for Deployment Mode 2
0
1
P
0
0
0
0
0
0
0
0
0
Channels activated or
channels waiting for FEN
input
Table 18.
Deployment mode 1 bit definition
Bit
MOSI command
MISO response
State
Description
D15
0
Mode Bits
See above
D14
1
See above
D13
-
Odd Parity – Includes all 16 bits
Odd Parity – Includes all 16 bits
D12 – D8
-
Arm pattern
See above



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