7480 datasheet(124/337 Pages) RENESAS

Part #	7480

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

PDF	337 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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124 / 337 page

7480 Group and 7481 Group User's Manual

1-107

1.14 Serial I/O

HARDWARE

1.14 Serial I/O

Serial I/O transmits or receives 8-bit data serially, between two microcomputers.

The serial I/O of the 7480 Group and 7481 Group can operate with a transmission format of either synchronous

or asynchronous (UART) type.

If data is not sent on the transmission line because of collision. The microcomputer informs external the

collision in the contention bus system communications by generating a bus arbitration interrupt request.

1.14.1 Registers Associated with Serial I/O

Figure 1.14.1 shows the memory map of the registers associated with serial I/O.

Figure 1.14.1 Memory Map of Registers Associated with Serial I/O

00E016

00E116

00E216

00E316

00E416

00E516

Transmit/receive buffer register (TB/RB)

Serial I/O status register (SIOSTS)

Serial I/O control register (SIOCON)

UART control register (UARTCON)

Baud rate generator (BRG)

Bus collision detection control register (BUSARBCON)

7480 Datasheet(PDF) 124 Page - Renesas Technology Corp