EM73982 View Datasheet(PDF) - ELAN Microelectronics
Part Name
Description
MFG CO.
'EM73982' PDF : 41 Pages View PDF
EM73982
4-BIT MICROCONTROLLER
PROGRAM ROM ( 16K X 8 bits ) for EM73982
16 K x 8 bits program ROM contains user's program and some fixed data.
The basic structure of program ROM can be divided into 6 parts.
1. Address 0000h: Reset start address.
2. Address 0002h - 000Ch : 5 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 region.
6. Address 1000h - 1FFFh (bank 1, 2, 3) : Only these area could be used as program ROM Data area which used
by LDAX, LDAXI instruction.
address Bank 0 :
0000h
Reset start address
0002h
INT0; interrupt service routine entry address
0004h
Reserved
0006h
TRGA
0008h
000Ah
000Ch
000Eh
0086h
TRGB
TBI
SPI
SCALL, subroutine call entry address
Subroutine call entry address
designated by [LCALL a]
instruction
...
07FFh
0800h
0FFFh
1000h
1FFFh
Bank 1
Bank 2
Bank 3
Data table for
[LDAX],[LDAXI]
instruction
* This specification are subject to be changed without notice.
11.30.2001 8
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