HI-8435PCT データシートの表示（PDF） - Holt Integrated Circuits

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HI-8435PCT

32-Channel Ground/Open or Supply/Open Sensor with SPI Interface

Holt Integrated Circuits 

HI-8435

Note: SPI Instruction op-codes not shown in Table 2 are

“reserved” and must not be used. Further, these op-codes will

not provide meaningful data in response to a read instruction.

Two instruction bytes cannot be “chained”; CSN must be

negated after each instruction, and then reasserted for the

following Read or Write instruction.

SCK

0 1234567 0 1234567

MSB

SI

High Z

SO

Op-Code Byte

LSB

MSB

CSN

Data Byte 0

LSB

High Z

FIGURE 5. Single-Byte Read From a Register

0 1234567 0 1234567 0 1234567

SCK

SPI Mode 0

MSB

LSB MSB

LSB MSB

LSB

SI

High Z

SO

Op-Code Byte

Data Byte 1

Data Byte 0

CSN

FIGURE 6. 2-Byte SPI Write Example

012345670123456701234567 01234567 01234567

SCK

SPI Mode 0

MSB

LSB MSB

LSB MSB

LSB MSB

LSB MSB

LSB

SI

High Z

SO

Op-Code Byte

Data Byte 3

Data Byte 2

Data Byte 1

Data Byte 0

CSN

FIGURE 7. 4-Byte SPI Read Example

HOLT INTEGRATED CIRCUITS

5

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