PRE
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ion. hange
icat
c
ecif ject to
p
al s
ub
a fin re s
not imits a
is c l
This enti
m
ice:
Not e para
Som
LIM
ARY
IN
MITSUBISHI MICROCOMPUTERS
M37274EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
PIN DESCRIPTION
Pin
V
CC
,
AV
CC
,
V
SS
CNV
SS
_____
Name
Power source
Input/
Output
Functions
Apply voltage of 5 V ± 10 % (typical) to V
CC
and AV
CC
, and 0 V to V
SS
.
CNV
SS
Reset input
Input
Connected to V
SS
.
To enter the reset state, the reset input pin must be kept at a “L” for 2
µs
or more (under
normal V
CC
conditions).
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
IN
and
X
OUT
. If an external clock is used, the clock source should be connected to the X
IN
pin and
the X
OUT
pin should be left open.
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
of P0
3
is CMOS output, that of P0
0
–P0
2
and P0
4
–P0
7
are N-channel open-drain output.
See notes at end of Table for full details of port P0 functions.
Pin P0
3
is also used as 14-bit PWM output pin DA. The output structure is CMOS output.
Pins P0
0
–P0
2
and P0
4
–P0
7
are also used as PWM output pins PWM4–PWM6 and PWM0–
PWM3 respectively. The output structure is N-channel open-drain output.
Port P1 is an 8-bit I/O port and has basically the same functions as port P0. The output
structure of P1
0
and P1
5
–P1
7
is CMOS output, that of P1
1
–P1
4
is N-channel open-drain
output.
Pin P1
0
is also used as OSD output pin OUT2. The output structure is CMOS output.
Pin P1
1
is used as SCL1, SCL2, SDA1 and SDA2 respectively, when multi-master I
2
C-
BUS interface is used. The output structure is N-channel open-drain output.
Pin P1
6
is also used as external interrupt input pin INT3.
Pin P1
7
is also used as serial I/O data input pin S
IN
.
Port P2 is an 8-bit I/O port and has basically the same functions as port P0. The output
structure is CMOS output.
Pins P2
4
–P2
6
, P2
7
are also used as analog input pins AD3–AD1, AD5 respectively.
Ports P3
0
and P3
1
are 2-bit I/O ports and have basically the same functions as port P0.
The output structure is CMOS output.
Ports P4
0
–P4
6
are a 7-bit input port.
Pin P4
0
is also used as analog input pin AD4.
Pins P4
1
, P4
4
are also used as external interrupt input pins INT2, INT1.
Pins P4
2
and P4
3
are also used as external clock input pins TIM2, TIM3 respectively.
Pin P4
5
is used as serial I/O data output pin S
OUT
. The output structure is N-channel open-
drain output.
Pin P4
6
is used as serial I/O synchronous clock input/output pin S
CLK
. The output structure
is N-channel open-drain output.
Ports P5
2
–P5
5
are 4-bit output ports. The output structure is CMOS output.
Pins P5
2
–P5
5
are also used as OSD output pins R, G, B, OUT1 respectively.
RESET
X
IN
X
OUT
P0
0
/PWM4–
P0
2
/PWM6,
P0
3
/DA,
P0
4
/PWM0–
P0
7
/PWM3
Clock input
Clock output
I/O port P0
Input
Output
I/O
DA output
8-bit PWM output
Output
Output
I/O
P1
0
/OUT2,
P1
1
/SCL1,
P1
2
/SCL2,
P1
3
/SDA1,
P1
4
/SDA2,
P1
5
,
P1
6
/INT3,
P1
7
/S
IN
I/O port P1
OSD output
Multi-master
I
2
C-BUS interface
External interrupt
input
Serial I/O data
input
Output
Output
Input
Input
I/O
Input
I/O
Input
Input
Input
Input
Output
I/O
P2
0
–P2
3
P2
4
/AD3–
P2
6
/AD
1,
P2
7
/AD5
P3
0
, P3
1
P4
0
/AD4,
P4
1
/INT2,
P4
2
/TIM2,
P4
3
/TIM3,
P4
4
/INT1,
P4
5
/S
OUT
,
P4
6
/S
CLK
I/O port P2
Analog input
I/O port P3
Input port P4
Analog input
External interrupt
input
External clock input
Serial I/O data
output
Serial I/O
synchronous clock
input/output
P5
2
/R,P5
3
/G, Output port P5
P5
4
/B,
P5
5
/OUT1
OSD output
Output
Output
6
RENESAS [ RENESAS TECHNOLOGY CORP ]
