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7721 bảng dữ liệu(PDF) 205 Page - Renesas Technology Corp

tên linh kiện 7721
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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SERIAL I/O
7721 Group User’s Manual
11–2
11.1 Overview
Serial I/O consists of 2 channels: UART0 and UART1. They each have a transfer clock generating timer for
the exclusive use of them and can operate independently. UART0 and UART1 have the same functions.
UARTi (i = 0 and 1) has the following 2 operating modes:
(1)
Clock synchronous serial I/O mode
Transmitter and receiver use the same clock as the transfer clock. Transfer data has a length of 8
bits.
(2)
Clock asynchronous serial I/O (UART) mode
Transfer rate and transfer data format can arbitrarily be set. The user can select a transfer data
length of 7 bits, 8 bits, or 9 bits.
Figure 11.1.1 shows the transfer data formats in each operating mode.
11.1 Overview
qClock synchronous serial I/O mode
Transfer data length of 8 bits
qUART mode
Transfer data length of 7 bits
Transfer data length of 8 bits
Transfer data length of 9 bits
Fig. 11.1.1 Transfer data formats in each operating mode



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