UPD17708 datasheet(219/358 Pages) RENESAS

219 / 358 page

217

µPD17704, 17705, 17707, 17708, 17709

Table 16-1. Classification and Communication Modes of Serial Interfaces

Number of

Channel

Communication

Communication Mode

Pins Used

Lines

Serial interface 0

2 lines (2-wire)

I2C bus

P0A3/SDA

Serial I/O

P0A2/SCL

3 lines (3-wire)

Serial I/O

P0A1/SCK0

P0A0/SO0

P0B3/SI0

Serial interface 1

3 lines (3-wire)

Serial I/O

P0B2/SCK1

P0B1/SO1

P0B0/SI1

16.2 Serial Interface 0

16.2.1 Outline of serial interface 0

Figure 16-2 outlines the serial interface 0.

Serial interface 0 can be used in 2-wire I2C bus or serial I/O mode, or 3-wire serial I/O mode.

Figure 16-2. Outline of Serial Interface 0

SCL/P0A2

SIO0CH flag

SB flag

SIO0MS flag

SIO0CH flag

SB flag

SIO0TX flag

Clock I/O

control block

Data I/O

control block

SIO0CK0, 1 flag

Wait signal

SIO0WSTT flag

SIO0WRQ0, 1 flag

SIO0NWT flag

4.5 MHz

SIO0IMD0, 1 flag

Interrupt

control block

Wait control

block

Clock control block

Clock counter

Start/stop

detection block

SIO0SF8, 9 flag

Count values 8, 9

SBSTT, SBBSY flag

Serial date

Acknowledge

control block

Presettable shift register 0

(SIO0SFR)

ACK

SBACK flag

SDA/P0A3

SO0/P0A0

SI0/P0B3

SCK0/P0A1

OUT

UPD17708 Datasheet(PDF) 219 Page - Renesas Technology Corp

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