R8CSLASH29 datasheet(266/471 Pages) RENESAS

266 / 471 page

R8C/28 Group, R8C/29 Group

16. Clock Synchronous Serial Interface

Rev.2.10

Sep 26, 2008

Page 249 of 441

REJ09B0279-0210

16. Clock Synchronous Serial Interface

The clock synchronous serial interface is configured as follows.

Clock synchronous serial interface

The clock synchronous serial interface uses the registers at addresses 00B8h to 00BFh. Registers, bits, symbols, and

functions vary even for the same addresses depending on the mode. Refer to the register diagrams of each function for

details.

Also, the differences between clock synchronous communication mode and clock synchronous serial mode are the

options of the transfer clock, clock output format, and data output format.

16.1

Mode Selection

The clock synchronous serial interface has four modes.

Table 16.1lists the Mode Selections. Refer to 16.2 Clock Synchronous Serial I/O with Chip Select (SSU) and the

sections that follow for details of each mode.

Clock synchronous serial I/O with chip select (SSU)

Clock synchronous communication mode

4-wire bus communication mode

I2C bus Interface

I2C bus interface mode

Clock synchronous serial mode

Table 16.1

Mode Selections

IICSEL Bit

in PMR

Bit 7 in 00B8h

(ICE Bit in ICCR1

Bit 0 in 00BDh

(SSUMS Bit in

SSMR2 Register, FS

Bit in SAR Register)

Function

Mode

Clock synchronous

serial I/O with chip

select

Clock synchronous communication

mode

4-wire bus communication mode

I2C bus interface

I2C bus interface mode

Clock synchronous serial mode

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