EM73P362 데이터 시트보기 (PDF) - ELAN Microelectronics

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EM73P362

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

EM73P362

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

FUNCTION DESCRIPTIONS

PROGRAM ROM ( 3K X 8 bits )

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

The basic structure of program ROM can be divided into 4 parts.

1. Address 000h: Reset start address.

2. Address 002h - 00Ch : 5 kinds of interrupt service routine entry addresses.

3. Address 00Eh-086h : SCALL subroutine entry address, only available at 00Eh,016h,01Eh,026h, 02Eh,

036h, 03Eh, 046h, 04Eh, 056h, 05Eh, 066h, 06Eh, 076h, 07Eh, 086h.

4. Address 000h - 7FFh : LCALL subroutine entry address.

5. Address 000h - BFFh : Except used as above function, the other region can be used as user's program region.

address

000h

002h

004h

006h

008h

00Ah

00Ch

00Eh

086h

...

BFFh

3072 x 8 bits

Reset start address

INT0; External interrupt service toutine entry address

TRGA; Timer/counter A interrupt service routine entry address

TRGB; Timer/counter B interrupt service routine entry address

TBI; Time base interrupt service routine entry address

INT1; External interrupt service routine entry address

SCALL, subroutine call entry address

User's program and fixed data are stored in the program ROM. User's program is according the PC value

to send next executed instruction code. Fixed data can be read out by table-look-up instruction.

Table-look-up instruction is depended on the Data Pointer (DP) to indicate to ROM address, then to get the

ROM code data.

LDAX

LDAXI

Acc ← ROM[DP]L

Acc ← ROM[DP]H,DP+1

DP is a 12-bit data register which can store the program ROM address to be the pointer for the ROM code data.

First, user load ROM address into DP by instruction "STADPL, STADPM, STADPH", then user can get the

lower nibble of ROM code data by instruction "LDAX" and higher nibble by instruction "LDAXI".

* This specification are subject to be changed without notice.

11.1.2001 5

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