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L9960 датащи(PDF) 79 Page - STMicroelectronics

номер детали L9960
подробное описание детали  Automotive Single/Dual H-Bridge, SPI programmable DC Brushed Motor Driver
PDF  95 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9960 датащи(HTML) 79 Page - STMicroelectronics

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DS11115 Rev 10
79/95
L9960, L9960T
Functional description
94
4.9.6
SPI communication mode (Parallel and Daisy chain mode)
The SPI communication between one master and multiple slaves can be operated in
parallel or in daisy chain.
Parallel operation: several SPI-slaves can be connected to one SPI channel. The
communication lines SDI, SDO and CLK are shared, and every slave has its own chip select
line (NCS).
Daisy chain operation: several L9960 can be connected to one SPI connection in daisy
chain operation to save µC interface pins. The number of devices connected in daisy chain
is unlimited.
Figure 37. Daisy chain operation example
Software constraint: daisy chain is only possibly for ASICs using the same SPI protocol.
single chain
Two devices in one daisy chain
Three devices in one daisy chain
shift register
SDI
μC
SCLK NCS1 NCS2 NCS3
IC C
IC B
IC A
NCS1
SCLK
NCS1 SCLK
NCS1 SCLK
NCS1 : low for 48 clocks SCLK
writes into IC A- -C
reads from IC A- - C
IC D
NCS2 SCLK
NCS2: low for 32 clocks SCLK
writes into IC D - E
reads from IC D - E
IC E
NCS2 SCLK
NCS3: low for 16 clocks CLK
writes into IC F
reads from IC F
SDO
IC F
NCS3 SCLK
SDI
SDO
SDI
SDI
SDO
SDO
SDO
SDI
SDI
SDO
SDI
SDO
shift register
shift register
shift register
shift register
shift register
shift register
GAPGPS02367



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