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AN2846 датащи(PDF) 28 Page - STMicroelectronics

номер детали AN2846
подробное описание детали  The serial current limited termination device
PDF  35 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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AN2846 датащи(HTML) 28 Page - STMicroelectronics

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SCLT3-8 link configurations
AN2846
28/35
Doc ID 15130 Rev 1
5
SCLT3-8 link configurations
Parallel and daisy chain configurations can be implemented using SCLT3-8 or other devices
compatible with a serial peripheral interface.
In parallel mode the microcontroller selects the SCLT-8 with which it wants to communicate
by setting the corresponding /CS to low state as long as the communication lasts. The
microcontroller should be able to control as many /CS pins as SCLT-8s it wants to address.
While in daisy chain configuration the microcontroller commands at the same time all the
SCLT3-8s connected in series. The data must transit from SCLT3-8 to SCLT3-8 going out
from the MISO pin, going in through MOSI pin till reaching the last one connected to the
microcontroller. Considering n SCLT3-8s connected in daisy chain, the microcontroller has
to read n times 16 bits and the communication time is proportional to n times 16 bits.
Figure 36.
Daisy-chain configuration
Figure 37.
Parallel configuration
SCK
MISO
/CS
MOSI
SCLT
1
SCK
MISO
/CS
MOSI
SCLT
2
SCK
MISO
/CS
MOSI
MASTER SPI
SCLT
1
SCK
MISO
/CS1
MOSI
MASTER SPI
SCK
MISO
/CS1
MOSI
SCLT
2
SCK
MISO
/CS2
MOSI
/CS2



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