32186 datasheet(560/1032 Pages) RENESAS

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SERIAL INTERFACE

12-12

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

(1) SIOn transmit interrupt request source select bit

[When set to "0"]

The transmit buffer empty interrupt is selected. A transmit buffer empty interrupt request is

generated when data is transferred from the transmit buffer register to the transmit shift register.

Also, a transmit buffer empty interrupt request is generated when the TEN (Transmit Enable) bit is

set to "1" (interrupt enabled).

[When set to "1"]

The transmission finished (transmit shift buffer empty) interrupt is selected. A transmission

finished interrupt request is generated when all of the data in the transmit shift register has been

transferred.

Note: • Do not select the transmission finished interrupt when an external clock is selected in

CSIO mode.

(2) SIOn receive interrupt request source select bit

[When set to "0"]

The reception finished (receive buffer full) interrupt is selected. A reception finished interrupt

request is also generated when a receive error (except overrun error) occurs.

[When set to "1"]

The receive error interrupt is selected. Following types of errors constitute a receive error:

• CSIO mode: Overrun error

• UART mode: Overrun, parity and framing errors

12.2 Serial Interface Related Registers

32186 Datasheet(PDF) 560 Page - Renesas Technology Corp