EM73P968 데이터 시트보기 (PDF) - ELAN Microelectronics
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EM73P968 Datasheet PDF : 53 Pages
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EM73P968
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary User's program and fixed data are stored in the program ROM. User's program is executed using the PC value
to fetch an instruction code.
The 16Kx8 bits program ROM can be divided into 4 banks. There are 4Kx8 bits per bank.
The program ROM bank is selected by P3(1..0). The program counter is a 13-bit binary counter. The PC and
P3 are initialized to "0" during reset.
When P3(1..0)=00B, the bank0 and bank1 of program ROM will be selected. P3(1..0)=01B, the bank0 and
bank2 will be selected.
P3=xx00B
Address
P3=xx11B
P3=xx01B
P3=xx10B
0000h
:
:
Bank0
Bank0
Bank0
0FFFh
1000h
:
:
Bank1
Bank2
Bank3
1FFFh
PROGRAM EXAMPLE:
BANK 0
START: :
:
:
LDIA #00H
; set program ROM to bank1
OUTA P3
B
XA1
:
XA :
:
:
LDIA #01H
; set program ROM to bank2
OUTA P3
B
XB1
:
XB :
:
:
LDIA #02H
; set program ROM to bank3
OUTA P3
B
XC1
:
XC :
:
:
B
XD
XD :
:
:
:
;--------------------------------------------------------------------------------------
BANK 1
XA1 :
:
:
B
XA
:
XA2 :
:
* This specification are subject to be changed without notice.
8.14.2001 7
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