5

PRELIMINAR

Y

Notice:

This

is not

a final

specification.

Some

parametric

limits

are

subject

to change.

MITSUBISHI MICROCOMPUTERS

M37735M4LXXXHP

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

A-D/UART2 trans./rece.

Timer B2

Timer B1

Timer B0

Timer A4

Timer A3

Timer A2

Timer A1

Timer A0

/Key input

Watchdog timer

DBC

BRK instruction

Zero divide

RESET

Internal peripheral

devices

control registers

refer to Fig. 2 for

detail information

Interrupt vector table

Internal RAM

2048 bytes

Internal ROM

32 Kbytes

UART1 transmission

UART1 receive

UART0 transmission

UART0 receive

Notes 1. Internal ROM area can be modified. (Refer to the section on ROM area modification function.)

BASIC FUNCTION BLOCKS

The M37735M4LXXXHP has the same fuanctions as the

M37735MHBXXXFP except for the memory allocation, the reset

circuit, the ROM area modification function, and the package.

Refer to the section on the M37735MHBXXXFP.

MEMORY

The memory map is shown in Figure 1. The address space has a

Built-in ROM, RAM and control registers for internal peripheral devices

vector addresses and contain the interrupt vectors. Refer to the section

on interrupts for details.

built-in RAM. In addition to storing data, the RAM is used as stack

during a subroutine call or interrupts.

Peripheral devices such as I/O ports, A-D converter, serial I/O, timer,

Additionally, the internal ROM area can be modified by software. Refer

to the section on ROM area modification function for details.

by using the direct page register (DPR). In the direct page addressing

mode, the memory in the direct page area can be accessed with two

words. Hence program steps can be reduced.

Fig. 1 Memory map