M37281EKSP datasheet(7/172 Pages) RENESAS

Part #	M37281EKSP

Description	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

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Manufacturer	RENESAS [Renesas Technology Corp]

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7 / 172 page

Rev.1.01

2003.07.16

page 7 of 170

M37281MAH–XXXSP,M37281MFH–XXXSP,M37281MKH–XXXSP, M37281EKSP

VCC,

(AVCC,)

VSS

CNVSS

RESET

XIN

XOUT

P00/

PWM4–

P02/PWM6,

P03/PWM7,

P04/

PWM0–

P07/PWM3

P10/OUT2,

P11/SCL1,

P12/SCL2,

P13/SDA1,

P14/SDA2,

P15/G0,

P16/INT3/

B0,

P17/SIN/R0

P20–P23

P24/AD3–

P26/AD1,

P27/AD5

P30/AD7,

P31/AD8

P40/AD4,

P41/INT2,

P42/TIM2,

P43/TIM3,

P44/INT1,

P45/SOUT,

P46/SCLK

Input

Output

I/O

Output

I/O

Output

I/O

Input

I/O

Input

I/O

Input

Output

I/O

Apply voltage of 5 V ± 10 % (typical) to VCC (AVCC ) , and 0 V to VSS.

(

) ...M37281EKSP

Connected to VSS.

To enter the reset state, the reset input pin must be kept at a LOW for 2

µs or more

(under normal VCC conditions).

If more time is needed for the quartz-crystal oscillator to stabilize, this LOW 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 XIN

and XOUT. If an external clock is used, the clock source should be connected to the XIN

pin and the XOUT 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 P03 is CMOS output, that of P00–P02 and P04–P07 are N-channel open-drain output

(See note.)

Pins P00–P03 and P04–P07 are also used as 8-bit PWM output pins PWM4–PWM7 and

PWM0–PWM3 respectively. The output structure of PWM0–PWM6 is N-channel open-drain

output. And the output structure of PWM7 is CMOS output.

Port P1 is an 8-bit I/O port and has basically the same functions as port P0. The output

structure of P10 and P15–P17 is CMOS output, that of P11–P14 is N-channel open-drain

output (See note.)

Pin P10, P15–P17 are also used as OSD output pins OUT2, G0, B0, R0, respectively. The

output structure is CMOS output.

Pin P11–P14 are used as SCL1, SCL2, SDA1 and SDA2 respectively, when multi-master

I2C-BUS interface is used. The output structure is N-channel open-drain output.

Pin P16 is also used as INT extemal interrupt input pin INT3.

Pin P17 is also used as serial I/O data input pin SIN.

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.)

Pins P24–P26, P27 are also used as analog input pins AD3–AD1, AD5 respectively.

Ports P30 and P31 are 2-bit I/O ports and have basically the same functions as port P0. The

output structure is CMOS output (See note.)

Pins P30, P31 are also used as analog input pins AD7, AD8 respectively.

Ports P40–P46 are a 7-bit input port.

Pin P40 is also used as analog input pin AD4.

Pins P41, P44 are also used as INT external interrupt input pins INT2, INT1.

Pins P42 and P43 are also used as INT external clock input pins TIM2, TIM3 for timer

respectively.

Pin P45 is used as serial I/O data output pin SOUT. The output structure is N-channel open-

drain output.

Pin P46 is used as serial I/O synchronous clock input/output pin SCLK. The output structure

is N-channel open-drain output.

Name

Functions

Input/

Output

Power source

CNVSS

Reset input

Clock input

Clock output

I/O port P0

8-bit PWM output

I/O port P1

OSD output

Multi-master

I2C-BUS interface

External interrupt

input

Serial I/O data

input

I/O port P2

Analog input

I/O port P3

Analog input

Input port P4

Analog input

External interrupt

input

External clock input

for timer

Serial I/O data

output

Serial I/O

synchronous clock

input/output

7. PIN DESCRIPTION

Table 7.1 Pin Description

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