M37212 Mitsubishi, M37212 Datasheet - Page 8

• Manufacturer Part Number: M37212
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
• Manufacturer: Mitsubishi

7. PIN DESCRIPTION
Table 7.1 Pin Description
8
V
V
CNV
______
RESET
X
X
P0
P0
P0
P1
A-D8,
P1
P1
P1
P1
P1
A-D1,
P1
P1
P2
P3
P3
P3
P3
P3
A-D4,
P3
P3
CC
SS.
IN
OUT
0
3
0
1
6
4
2
3
4
5
6
7
0
0
2
3
4
5
7
Pin
/PWM4– I/O port P0
/PWM7,
/OUT2/ I/O port P1
/SCL1, OSD output
/OSC1, Clock input for
–P0
/SCL2, Multi-master
/SDA1, I
/SDA2, Analog input
/INT3/
/A-D2,
/A-D3
–P2
, P3
/TIM2,
/TIM3,
/INT1,
/INT2/
/OSC2 OSD display
,
SS
7
7
1
Power source
CNV
Reset input
Clock input
Clock output
PWM output
Input port P1
Analog input
External interrupt
input
I/O port P2
I/O port P3
Input port P3
External clock input
External interrupt
input
Analog input
Clock output for
OSD display
2
C-BUS interface
SS
Name
Output
Input/
Output
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
I/O
I/O
I/O
I/O
I/O
M37212M4/M8–XXXSP, M37212M6–XXXSP/FP
Apply voltage of 5 V
This is connected to V
normal V
If more time is needed for the quartz-crystal oscillator to stabilize, this “L” condition should
be maintained for the required time.
This chip has an internal clock generating circuit. To control generating frequency, an
external ceramic resonator or a quartz-crystal oscillator is connected between pins X
X
the X
Port P0 is an 8-bit I/O port with direction register allowing each I/O bit to be individually
programmed as input or output. At reset, this port is set to input mode. The output structure
is N-channel open-drain output. (See note)
Pins P0
structure is N-channel open-drain output.
Port P1
output structure is CMOS output.
Pins P1
Pins P1
I
P1
Port P1
Pins P1
P1
Port P2 is an 8-bit I/O port and has basically the same functions as port P0. The output
structure is CMOS output. (See note)
Ports P3
output structure is CMOS output.
Ports P3
Pins P3
Pins P3
P3
P3
P3
output.
To enter the reset state, the reset input pin must be kept at a “L” for 2 s or more (under
2
OUT
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
C-BUS interface is used. The output structure is N-channel open-drain output.
7
0
5
5
6
pin is also used as analog input pin A-D8.
pin is also used as INT external interrupt input pin INT3.
pin is also used as analog input pin A-D4.
pin is also used as OSD display clock input pin OSC1.
pin is also used as OSD display clock output pin OSC2. The output structure is CMOS
. If an external clock is used, the clock source should be connected to the X
OUT
5
0
0
0
1
5
2
4
–P1
2
–P0
–P1
–P1
–P1
0
, P3
, P3
CC
is also used as OSD output pin OUT2. The output structure is CMOS output.
pin should be left open.
–P3
, P3
conditions).
7
4
7
3
5
3
4
7
1
are a 3-bit input port and has basically the same functions as port P0.
are used as SCL1, SCL2, SDA1 and SDA2 respectively, when multi-master
are also used as analog input pins A-D1 to A-D3 respectively.
are also used as external clock input pins TIM2, TIM3 respectively.
are also used as INT external interrupt input pins INT1, INT2 respectively.
are also used as PWM output pins PWM4–PWM7 respectively. The output
are a 5-bit I/O port and has basically the same functions as port P0. The
are a 6-bit input port and has basically the same functions as port P0.
are a 2-bit I/O port and has basically the same functions as port P0. The
SS
10 % to (typical) V
.
CC
with ON-SCREEN DISPLAY CONTROLLER
Functions
, and 0 V to V
MITSUBISHI MICROCOMPUTERS
M37212EFSP/FP
SS
.
IN
pin and
Rev. 1.0
IN
and