W681307DG Datasheet, PDF (131/160 Pages) Winbond – USB1.1 CODEC Microprocessor Control Unit with 32KB Mask ROM and 4KB RAM.

W681307
16. SPI FOR SERIAL DATA FLASH
16.1
Introduction to SPI of Serial Data Flash
Winbond W681307 chip embed a SPI of serial data flash (DF_SPI) port which is a 4-pin (SCK, /DF_CS, SDI, SDO) SPI Interface. This
SPI interface makes W681307 chip easy to control 4-pin Serial Peripheral Interface (SPI) Data Flash memories. It has various clock speed
and data format configurations by setting control register. The SPI interface can be operated at clock rates of up to CPU CLK frequency /
2.
16.2
Block Diagram
Figure 16-1 The SPI of the Serial Data Flash block diagram
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Publication Release Date: May, 2007
Revision 1.3