MFC2000 datasheet(193/426 Pages) ETC

193 / 426 page

Hardware Description

MFC 2000 Multifunctional Peripheral Controller 2000

100723A

Conexant

7-45

Bit 2

WAC – Write Acknowledge

Writing a 1 to this bit will generate ACKNOWLEDGE condition after

write operation in which the master will:

1. generate clock pulse

2. NOT drive SID but will capture acknowledge bit from slave and

store it into bit 8 of ‘SPI_Stat’ register

Reading a 1 from this bit indicates WAC operation is active.

Bit 1

SID – Serial Input Data

This bit is used to control the SID line directly, and it is only valid if the

“Manual Operation” bit in SPI_Config is equal to 1. When SID = 1,

then SPI is not driving the SID line. When SID = 0, then SPI will drive

SID line low.

Bit 0

SIC – Serial Input Clock

This bit is used to control the SIC line directly, and it is only valid if the

“Manual Operation” bit in SPI_Config is equal to 1. When SIC = 1,

then SPI is not driving the SIC line. When SIC = 0, then SPI will drive

SIC line low.

Note:

In normal case, only one of bit [7:2] should be set. However, if for some reasons, more

than one bits are set, then the hardware will respond according to the following priority. Other

bit(s) that are set will be ignored.

Priority

Operation

1RST

2STO

3STA

4REA

5RAC

6WAC

7WRI

MFC2000 데이터시트(PDF) 193 Page - List of Unclassifed Manufacturers