參數(shù)資料
型號(hào)： M38203E4HP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù)： 29/66頁(yè)
文件大小： 1093K
代理商： M38203E4HP
29
MITSUBISHI MICROCOMPUTERS
3820 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
SERIAL I/O2
The serial I/O2 function can be used only for clock synchronous
serial I/O.
For clock synchronous serial I/O2 the transmitter and the receiver
must use the same clock. If the internal clock is used, transfer is
started by a write signal to the serial I/O2 register.
Serial I/O2 Control Register (SIO2CON) 001D
16
The serial I/O2 control register contains 7 bits which control vari-
ous serial I/O functions.
Fig. 20 Structure of serial I/O2 control register
Fig. 21 Block diagram of serial I/O2 function
Serial I/O2 control register
(SIO2CON : address 001D
16
)
b7
0 0 0: f(X
IN
)/8
0 0 1: f(X
IN
)/16
0 1 0: f(X
IN
)/32
0 1 1: f(X
IN
)/64
1 0 0:
1 0 1:
1 1 0: f(X
IN
)/128
1 1 1: f(X
IN
)/256
Serial I/O2 port selection bit
0: I/O port
1: S
OUT2
,S
CLK2
signal output
S
RDY2
output enable bit
0: I/O port
1: S
RDY2
signal output
Transfer direction selection bit
0: LSB first
1: MSB first
Synchronization clock selection bit
0: External clock
1: Internal clock
Not used (returns “0” when read)
b0
b2 b1 b0
Do not set
X
IN
"1"
"0"
"0"
"0"
"1"
S
RDY2
S
C
"0"
"1"
1/8
1/16
1/32
1/64
1/128
1/256
Data bus
Serial I/O2
interrupt request
Serial I/O2 port selection bit
Serial I/O counter 2 (3)
Serial I/O shift register 2 (8)
Synchronization circuit
Serial I/O2 por"1"
Synchronization clock
selection bit
S
RDY2
output enable bit
External clock
Internal synchronization
clock select bits
D
P5
3
latch
P5
3
/S
RDY2
P5
2
/S
CLK2
P5
1
/S
OUT2
P5
0
/S
IN2
P5
2
latch
P5
1
latch
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