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7721 데이터시트(PDF) 206 Page - Renesas Technology Corp

부품명 7721
상세설명  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  577 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

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SERIAL I/O
7721 Group User’s Manual
11–3
11.2 Block description
Figure 11.2.1 shows the block diagram of Serial I/O. Registers relevant to Serial I/O are described below.
11.2 Block description
RxDi
Data bus (odd)
Data bus (even)
00
0
0
0
0
0
UARTi receive register
UARTi receive
buffer register
UARTi transmit
buffer register
Receive
control circuit
Transmit control
circuit
1 / (n+1)
1/16
1/16
1/2
BRGi
Clock synchronous
(internal clock selected)
UART
Clock
synchronous
UART
Clock synchronous
(internal clock selected)
Clock synchronous
(external clock selected)
Data bus (odd)
Data bus (even)
TxDi
Transfer clock
Transfer clock
CLKi
BRG count source
select bits
CTSi / RTSi
UARTi transmit register
n: Values set in UARTi baud rate register (BRGi)
Clock
synchronous
D8 D7 D6 D5 D4 D3 D2 D1 D0
f2
f16
f64
f512
D8 D7 D6 D5 D4 D3 D2 D1 D0
Fig. 11.2.1 Block diagram of Serial I/O



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