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EM73PA88ABQ

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

FUNCTION DESCRIPTIONS

EM73PA88A

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

PROGRAM ROM ( 16K X 8 bits )

16 K x 8 bits program ROM contains user's program and some fixed data.

The basic structure of the program ROM may be categorized into 5 partitions.

1. Address 0000h: Reset start address.

2. Address 0002h - 000Ch : 6 kinds of interrupt service routine entry addresses.

3. Address 000Eh-0086h : SCALL subroutine entry address, only available at 000Eh, 0016h, 001Eh, 0026h, 002Eh,

0036h, 003Eh, 0046h, 004Eh, 0056h, 005Eh, 0066h, 006Eh, 0076h, 007Eh,0086h.

4. Address 0000h - 07FFh : LCALL subroutine entry address.

5. Address 0000h - 1FFFh : Except used as above function, the other region can be used as user's program and

data region.

address Bank 0 :

0000h

0002h

0004h

0006h

0008h

000Ah

000Ch

000Eh

0086h

...

07FFh

0800h

Reset start address

INT0 ; interrupt service routine entry address

SPI

TRGA

TRGB

TBI

INT1

SCALL, subroutine call entry address

0FFFh

1000h

1FFFh

Bank 1

Bank 2

Bank 3

Subroutine call entry address

designated by [LCALL a]

instruction

Data table for

[LDAX],[LDAXI]

instruction

* This specification are subject to be changed without notice.

10.8.2001 6

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