Detailed Explanation; Overview; Data Format - Toshiba TMPR4925 Manual

11.3 Detailed Explanation

11.3.1

Overview

During reception, serial data that are input as an RXD signal from an external source are converted
into parallel data, then are stored in the Receive FIFO buffer. Parallel data stored in the FIFO buffer are
fetched by either CPU or DMA transfer.
During transmission, parallel data written to the Transmit FIFO buffer by CPU or DMA transfer are
converted into serial data, then are output as a TXD signal.
11.3.2

Data Format

The TX4925 SIO can use the following data formats.
Data Length
Stop Bit
Parity Bit
Parity Format
Start Bit
Figure 11.3.1 illustrates the data frame when making each setting.
: 8/7 bits
: 1/2 bits
: Yes/No
: Even/Odd
: Fixed to 1 bit
11-3
Chapter 11 Serial I/O Port