參數(shù)資料
型號(hào)： M37210M3-908SP
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)： 39/59頁(yè)
文件大小： 764K
代理商： M37210M3-908SP
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
39
I/O PORTS
(1) Port P0
Port P0 is an 8-bit I/O port with N-channel open-drain output.
As shown in the memory map (Figure 3), port P0 can be ac-
cessed at zero page memory address 00C0
16
.
Port P0 has a directional register (address 00C1
16
) which can be
used to program each individual bit as input (“0”) or as output
(“1”). If the pins are programmed as output, the output data is
latched to the port register and then output. When data is read
from the output port the output pin level is not read, only the
latched data in the port register is read. This allows a previously
output value to be read correctly even though the output voltage
level is shifted up or down.
Pins set as input are in the floating state and the signal levels can
thus be read. When data is written into the input port, the data is
latched only to the port latch and the pin still remains in the float-
ing state.
Ports P0
0
-P0
3
are in common with 6-bit PWM outputs PWM4-
PWM7. For the M37211M2, ports P0
0
and P0
1
are in common
with 6-bit PWM outputs PWM4 and PWM5.
(2) Port P1
Port P1 has basically the same function as port P0 except the
output structure is CMOS output. But, pins P1
5
-P1
7
are input
ports and in common with analog input pins A-D1-A-D3.
(3) Port P2
Port P2 has basically the same function as port P1.
(4) Port P3
Port P3 are a 2-bit I/O port and a 4-bit input port with function
similar to port P2, but the output structure of P3
0
, P3
1
is CMOS
output.
P3
2
, P3
3
are in common with the external clock input pins of timer
2 and 3.
P3
4
, P3
5
are in common with the external interrupt input pins
INT1, INT2 and P3
5
with the analog input pin of A-D comparator
A-D4.
(5) Port P4
Port P4 are a 2-bit I/O port and a 1-bit input port with function
similar to port P2, but the output structure is N-channel open-
drain output.
When a serial I/O function is selected, P4
0
-P4
2
are in common
with pins S
OUT
, S
CLK
and S
IN
.
(6) OSC1, OSC2 pins
Clock input/output pins for CRT display function.
(7) H
SYNC
, V
SYNC
pins
H
SYNC
is a horizontal synchronizing signal input pin for CRT dis-
play.
V
SYNC
is a vertical synchronizing signal input pin for CRT display.
(8) R, G, B, OUT pins
This is an 4-bit output pin for CRT display and in common with
P5
2
-P5
5
.
(9) Port P6
Port P6 is an 4-bit output port with function similar to port P0, but
the output structure is N-channel opendrain output.
This port is in common with 6-bit PWM output pin PWM0-PWM3.
(10) D-A pin
This is a 14-bit PWM output pin.
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