Renesas 16-bit single-chip microcomputer Manual De Usuario

Rev.1.02    Jul 01, 2005    page 124 of 314
REJ09B0126-0102

M16C/6N Group (M16C/6NL, M16C/6NN)

14. Serial I/O

This document is under development and its contents are subject to change.

Serial I/O is configured with 7 channels: UART0 to UART2 and SI/O3 to SI/O6 

(1)

.

NOTE:

1. 100-pin version supports 5 channels; UART0 to UART2, SI/O3, SI/O4

128-pin version supports 7 channels; UART0 to UART2, SI/O3 to SI/O6

UARTi each have an exclusive timer to generate a transfer clock, so they operate independently of each other.

Figures 14.1 to 14.3 show the block diagram of UARTi. Figure 14.4 shows the block diagram of the UARTi

transmit/receive.

UARTi has the following modes:

• Clock synchronous serial I/O mode

• Clock asynchronous serial I/O mode (UART mode).

• Special mode 1 (I

2

C mode)

• Special mode 2

• Special mode 3 (Bus collision detection function, IE mode)

• Special mode 4 (SIM mode) : UART2

Figures 14.5 to 14.10 show the UARTi-related registers.

Refer to tables listing each mode for register setting.