Transfer Data Format - Renesas 7700 FAMILY User Manual

SERIAL I/O
7.4 Clock asynchronous serial I/O (UART) mode

7.4.2 Transfer data format

The transfer data format can be selected from formats shown in Figure 7.4.1. Bits 4 to 6 at addresses 30
and 38 select the transfer data format. (Refer to Figure 7.1.1.) Set the same transfer data format for both
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transmitter and receiver sides.
Figure 7.4.2 shows an example of transfer data format. Table 7.4.6 lists each bit in transmit data.
Transfer data length of 7 bits
Transfer data length of 8 bits
Transfer data length of 9 bits
Fig. 7.4.1 Transfer data format
7–38
1ST—7DATA
1ST—7DATA
1ST—7DATA—1PAR— 1SP
1ST—7DATA—1PAR— 2SP
1ST—8DATA
1ST—8DATA
1ST—8DATA—1PAR— 1SP
1ST—8DATA—1PAR— 2SP
1ST—9DATA
1ST—9DATA
1ST—9DATA—1PAR— 1SP
1ST—9DATA—1PAR— 2SP
7751 Group User's Manual
1SP
2SP
1SP
2SP
1SP
ST : Start bit
2SP
DATA : Character bit (transfer data)
PAR : Parity bit
SP : Stop bit
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