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AN2335 датащи(PDF) 14 Page - STMicroelectronics

номер детали AN2335
подробное описание детали  This document is intended to give application
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2335 датащи(HTML) 14 Page - STMicroelectronics

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Digital interfaces
AN2335
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4.2.2
SPI read
Figure 5.
SPI read protocol
The SPI Read command is performed with 16 clocks pulses. Multiple byte read command is
performed adding blocks of 8 clocks pulses at the previous one.
bit 0: READ bit. The value is 1.
bit 1: MS bit. When 0 do not increment address, when 1 increment address in multiple
reading.
bit 2-7: address AD(5:0). This is the address field of the indexed register.
bit 8-15: data DO(7:0) (read mode). This is the data that will be read from the device (MSb
first).
bit 16-... : data DO(...-8). Further data in multiple byte reading.
Figure 6.
Multiple bytes SPI read protocol (2 bytes example)
4.2.3
SPI Write
Figure 7.
SPI Write Protocol
CS
SPC
SDI
SDO
RW
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
AD5 AD4 AD3 AD2 AD1 AD0
MS
CS
SPC
SDI
SDO
RW
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
AD5 AD4 AD3 AD2 AD1 AD0
DO15DO14DO13DO12DO11DO10DO9 DO8
MS
CS
SPC
SDI
RW
DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0
AD5 AD4 AD3 AD2 AD1 AD0
MS



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