7477 datasheet(119/354 Pages) RENESAS

Part #	7477

Description	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

PDF	354 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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HARDWARE

1-102

7470/7471/7477/7478 GROUP USER’S MANUAL

1.13 Serial I/O

1.13A.5 Related registers

(1) Serial I/O register (SIO: Address 00DD16)

The Serial I/O register is written Serial I/O transmit data or is read receive data.

q When transmitting data, write transmit data into this register.

q Receive data can be obtained by reading this register.

Figure 1.13A.7 shows a structure of the Serial I/O register.

Fig. 1.13A.7 Structure of Serial I/O register

b7 b6 b5 b4 b3 b2 b1 b0

Serial I/O register (SIO) [Address

Function

At reset

R W

Serial I/O register (7470/7471 group)

A value of “0016” to “FF16” can be

set as transmit data.

At the transmit, data is transmitted one

bit at a time starting with the least

significant bit.

At the receive, data is received one bit

at a time starting with the most

significant bit.

At transmit:

At receive:

00DD16]

7477 Datasheet(PDF) 119 Page - Renesas Technology Corp