AT89S4D12-12JC View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT89S4D12-12JC

8-Bit Microcontroller with 132K Bytes Flash Data Memory

Atmel Corporation 

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Figure 2. SPI Master - Slave Interconnection

MSB MASTER

LSB

8-BIT SHIFT REGISTER

MISO SDO

MOSI SDI

MSB SLAVE LSB

8-BIT SHIFT REGISTER

SPI

CLOCK GENERATOR

Figure 3. SPI Transfer Format with CPHA = 0

SCK SCK

SS

VCC

* Not defined but normally MSB of character just received.

Figure 4. SPI Transfer Format with CPHA = 1

* Not defined but normally LSB of previously transmitted character.

4-288

AT89S4D12

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