參數(shù)資料
型號(hào)： M37210M3-010SP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
中文描述： 單芯片8位CMOS微機(jī)電壓合成與屏幕顯示控制器
文件頁(yè)數(shù)： 13/59頁(yè)
文件大?。?/td> 764K
代理商： M37210M3-010SP
MITSUBISHI MICROCOMPUTERS
M37210M3-XXXSP/FP, M37210M4-XXXSP, M37211M2-XXXSP
M37210E4-XXXSP/FP, M37210E4SP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
13
Fig. 8 Serial I/O block diagram
SERIAL I/O
M37210M3-XXXSP has a serial I/O.
A block diagram of the serial I/O is shown in Figure 8.
Synchronous input/output clock (S
CLK
), and the serial I/O pins (S
OUT
,
S
IN
) are used as port P4. The serial I/O mode registers (address
00DC
16
) are 8-bit registers. Bits 0, 1 and 2 of these registers are
used to select a synchronous clock source.
Bit 3 decides whether parts of P4 will be used as a serial I/O or not.
To use P4
2
as a serial input, set the directional register bit which cor-
responds to P4
2
to “0”. For more information on the directional regis-
ter, refer to the I/O pin section.
The serial I/O function is discussed below. The function of the serial
I/O differs depending on the clock source ; external clock or internal
clock.
Data bus
X
IN
8
1/2
1/2
P4
1
latch
P4
1
/S
CLK
SM
3
P4
0
latch
SM
3
P4
0
/S
OUT
P4
2
/S
IN
SM
2
SM
1
SM
0
1/4
1/8 1/16
Frequency
divider
Serial I/O counter (8)
SM
5
: LSB
MSB
Serial I/O shift register (8)
(address 00DD
16
)
Serial I/O
interrupt request
Synchronization
circuit
SM
6
Selection gate : Connected to black
colored side at reset.
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