參數(shù)資料
型號(hào)： M38271MD-XXXFS
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)： 29/70頁(yè)
文件大?。?/td> 1112K
代理商： M38271MD-XXXFS
29
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3827 Group
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. When the internal clock is used, transfer
is started by a write signal to the serial I/O2 register.
When an internal clock is selected as the synchronous clock of the
serial I/O2, either P6
2
or P6
3
can be selected as an output pin of
the synchronous clock. In this case, the pin that is not selected as
an output pin of the synchronous clock functions as a port.
[Serial I/O2 Control Register (SIO2CON)]
001D
16
The serial I/O2 control register contains 8 bits which control vari-
ous serial I/O2 functions.
Fig. 26 Structure of serial I/O2 control register
Serial I/O2 control register
(SIO2CON : address 001D
16
)
Internal synchronous clock select bits
IN
)/8 (f(X
CIN
)/8 in low-speed mode)
0 0 1: f(X
IN
)/16 (f(X
CIN
)/16 in low-speed mode)
0 1 0: f(X
IN
)/32 (f(X
CIN
)/32 in low-speed mode)
0 1 1: f(X
IN
)/64 (f(X
CIN
)/64 in low-speed mode)
1 0 0:
1 0 1:
1 1 0: f(X
IN
)/128 (f(X
CIN
)/128 in low-speed mode)
1 1 1: f(X
IN
)/256 (f(X
CIN
)/256 in low-speed mode)
b7
Serial I/O2 port selection bit
0: I/O port
1: S
OUT2
,S
CLK21
/S
CLK22
signal output
P6
/S
P-channel output disable bit
0: CMOS output (in output mode)
1: N-channel open-drain output
(in output mode)
Transfer direction selection bit
0: LSB first
1: MSB first
Synchronous clock selection bit
0: External clock
1: Internal clock
Synchronous clock output pin selection bit
0: S
CLK21
1: S
CLK22
b0
b2 b1 b0
Do not set
Fig. 27 Block diagram of serial I/O2 function
f(X
IN
)
“1”
“0”
“0”
“1”
“0”
“1”
S
C
(Note)
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)
Synchronous circuit
Synchronous clock
selection bit
External clock
Internal synchronous
clock select bits
D
P6
3
latch
P6
3
/S
CLK22
P6
2
/S
CLK21
P6
1
/S
OUT2
P6
0
/S
IN2
P6
2
latch
P6
1
latch
(Note)
Note:
It is selected by the synchronous clock selection bit, the synchronous
clock output pin selection bit, and the serial I/O port selection bit.
(f(X
CIN
) in low-speed mode)
相關(guān)PDF資料
PDF描述
M38271MD-XXXGP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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M38271ME-XXXFS SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M38271ME-XXXGP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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