7480 datasheet(152/337 Pages) RENESAS

152 / 337 page

7480 Group and 7481 Group User's Manual

1-135

HARDWARE

Figure 1.14.22 Setting of UART (2)

1.14 Serial I/O

Interrupt control register 1 (ICON1) [Address 00FE16]

Serial I/O receive interrupt request bit (when receiving)

Serial I/O transmit interrupt request bit (when transmitting)

Procedure 6 Setting interrupt when serial I/O transmit/receive interrupt is used (Note 2)

Interrupt request register 1 (IREQ1) [Address 00FC16]

2. Serial I/O transmit/receive interrupt is enabled

1. ‘0’ is set to serial I/O transmit/receive interrupt request bit

Serial I/O receive interrupt enabled (when receiving)

Serial I/O transmit interrupt enabled (when transmitting)

Writing transmit data

Procedure 7 Start of data transmit when transmitting

Transmit buffer register (TB) [Address 00E016]

Character length selection

0: 8 bits

1: 7 bits

Parity enable selection

0: Parity disabled

1: Parity enabled

Procedure 5 Setting UART control register

UART control register (UARTCON) [Address 00E316]

Parity selection (valid only when parity enabled)

0: Even parity

1: Odd parity

Stop bit length selection

0: 1 stop bit

1: 2 stop bits

Notes 2: Refer to Using Serial I/O Transmit Interrupt and Serial I/O Receive Interrupt

in (5) Notes on Usage of UART.

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