EM73P461A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
PROGRAM EXAMPLE: Read out the ROM code of address 1777h by table-look-up instruction for 8K ROM.
LDIA #07h;
STADPL
; DP3-0 ← 07h
STADPM ; DP5-4 ← 07h
STADPH
:
; DP8-6 ←07h, Load DP=1777h
LDL#00h;
LDH#03h;
LDAX
STAMI
LDAXI
STAM
:
; ACC ← 6h
; RAM[30] ← 6h
; ACC ← 5h
; RAM[31] ← 5h
BANK1
ORG1777h
DATA 56h;
:
DATA RAM ( 244-nibble )
There is total 244 - nibble data RAM from address 00 to F3h
Data RAM includes 3 parts: zero page region, stacks and data area.
Increment
Address
zero page
00h~0Fh
10h~1Fh
20h~2Fh
30h~3Fh
40h~4Fh
:
LCD display RAM
B0h ~ BFh
C0h ~ CFh
D0h ~ DFh
E0h ~ EFh
F0h ~ F3h
level 0
level 4
level 8
level C
level 1
level 5
level 9
level 2
level 6
level A
level 3
level17
level B
* This specification are subject to be changed without notice.
12.27.2001
7
ELAN [ ELAN MICROELECTRONICS CORP ]
