4

MITSUBISHI MICROCOMPUTERS

M37733EHBXXXFP

M37733EHBFS

PROM VERSION OF M37733MHBXXXFP

PRELIMINAR

Y

Notice:

This

is not

a final

specification.

Some

parametric

limits

are

subject

to change.

Pin

Name

Input/Output

Functions

Vcc,

Power source

Apply 5 V ± 10% to Vcc and 0 V to Vss.

Vss

CNVss

CNVss input

Input

This pin controls the processor mode. Connect to Vss for the single-chip mode and the memory

expansion mode, and to Vcc for the microprocessor mode.

_____

RESET

Reset input

Input

When “L” level is applied to this pin, the microcomputer enters the reset state.

These are pins of main-clock generating circuit. Connect a ceramic resonator or a quartz-

_

E

Enable output

Output

This pin functions as the enable signal output pin which indicates the access status in the internal

_

BYTE

External data

Input

In the memory expansion mode or the microprocessor mode, this pin determines whether the

bus width

external data bus has an 8-bit width or a 16-bit width. The data bus has a 16-bit width when “L”

selection input

signal is input and an 8-bit width when “H” signal is input.

AVcc,

Analog power

Power source input pin for the A-D converter. Externally connect AVcc to Vcc and AVss to Vss.

AVss

source input

Reference

Input

This is reference voltage input pin for the A-D converter.

voltage input

I/O port P0

I/O

In the single-chip mode, port P0 becomes an 8-bit I/O port. An I/O direction register is available so

that each pin can be programmed for input or output. These ports are in the input mode when

reset.

I/O port P1

I/O

In the single-chip mode, these pins have the same functions as port P0. When the BYTE pin is set

to “L” in the memory expansion mode or the microprocessor mode and external data bus has a

I/O port P2

I/O

In the single-chip mode, these pins have the same functions as port P0. In the memory expansion

I/O port P3

I/O

In the single-chip mode, these pins have the same function as port P0. In the memory expansion

__ ____

_____

I/O port P4

I/O

In the single-chip mode, these pins have the same functions as port P0. In the memory expansion

_____

____

clock

I/O port P5

I/O

In addition to having the same functions as port P0 in the single-chip mode, these pins also

__

__

I/O port P6

I/O

In addition to having the same functions as port P0 in the single-chip mode, these pins also

____

____

I/O port P7

I/O

In addition to having the same functions as port P0 in the single-chip mode, these pins function as

a resonator or an oscillator between the both.

I/O port P8

I/O

In addition to having the same functions as port P0 in the single-chip mode, these pins also

function as I/O pins for UART 0 and UART 1.

PIN DESCRIPTION

Clock output

Output

Clock input

Input