參數(shù)資料
型號(hào): 7560
英文描述: 7560 Group Datasheet Datasheet 1682K/JAN.14.03
中文描述: 7560組數(shù)據(jù)表數(shù)據(jù)表1682K/JAN.14.03
文件頁數(shù): 33/90頁
文件大小: 1682K
代理商: 7560
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
7560 Group
32
SERIAL I/O
Serial I/O1
Serial I/O1 can be used as either clock synchronous or asynchro-
nous (UART) serial I/O. A dedicated timer (baud rate generator) is
also provided for baud rate generation.
(1) Clock Synchronous Serial I/O Mode
Clock synchronous serial I/O mode is selected by setting the se-
rial I/O1 mode selection bit of the serial I/O1 control register to
1
.
For clock synchronous serial I/O mode, the transmitter and the re-
ceiver must use the same clock as an operation clock.
When an internal clock is selected as an operation clock, transmit
or receive is started by a write signal to the transmit buffer regis-
ter.
When an external clock is selected as an operation clock, serial I/
O1 becomes the state where transmit or receive can be performed
by a write signal to the transmit buffer register. Transmit and re-
ceive are started by input of an external clock.
Fig. 28 Block diagram of clock synchronous serial I/O1
Fig. 29 Operation of clock synchronous serial I/O1 function
P
4
6
/
S
C
L
K
1
P
4
7
/
S
R
D
Y
1
P
4
4
/
R
X
D
P4
5
/T
X
D
X
I
N
1
/
4
1/4
F
/
F
Serial I/O1 status register
Serial I/O1 control register
R
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1
6
Receive shift register
Receive buffer full flag (RBF)
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t
Receive clock control circuit
S
h
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Serial I/O1 synchronous
clock selection bit
Frequency division ratio 1/(n+1)
Baud rate generator
A
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0
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1
C
1
6
BRG count source selection bit
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Data bus
Address 0018
16
S
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k
Transmit shift register shift completion flag (TSC)
Transmit interrupt source selection bit
Transmit buffer empty flag (TBE)
Address 0019
16
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Receive enable signal S
RDY1
D
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2
D
3
D
4
D
5
D
6
RBF =
1
TSC =
1
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TBE =
1
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(N
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(Note 3)
(Note 2)
(Note 3)
(Note 4)
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