SERIAL I/O
[Precautions for clock asynchronous serial I/O (UART) mode]
[Precautions for clock asynchronous serial I/O (UART) mode]
1. When separating CTS
i
/RTS
i
, the CLK
i
pin cannot be used. Accordingly, when separating CTS
i
/RTS in
i
UART mode, be sure to select an internal clock.
2. Writing to the UARTi baud rate register (BRGi) must be performed while transmission/reception halts.
3. When transmitting, be sure to clear the TxD /P1 or TxD /P1 switch bit (bits 2, 3 at address AC16) to “0.”
0
3
1
7
7906 Group User’s Manual Rev.2.0
11-54