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參數(shù)資料
| 型號： | EM73461B |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT |
| 中文描述： | 4位微控制器的液晶產(chǎn)品 |
| 文件頁數(shù)： | 8/40頁 |
| 文件大小： | 231K |
| 代理商： | EM73461B |
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* This specification are subject to be changed without notice.
EM73461B
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
12.26.2001
Preliminary
PROGRAM COUNTER (4K/8K ROM)
Program counter ( PC ) is composed by a 12-bit counter for 4K ROM/13-bit counter for 8K ROM which indicates
the next executed address for the instruction of program ROM.
For a 4K - byte size ROM, PC can indicate address form 000h - FFFh, for BRANCH and CALL instrcutions,
PC is changed by instruction indicating.
For a 8K - byte size ROM, PC can indicate address form 0000h - 1FFFh, for BRANCH and CALL instrcutions,
PC is changed by instruction indicating.
(1) Branch instruction:
SBR a
Object code: 00aa aaaa
Condition: SF=1; PC
←
PC
11-6.a
( branch condition satisified )
PC
Hold original PC value+1
a
a
a
a
a
a
(for 4K/8K ROM)
SF=0; PC
←
PC +1( branch condition not satisified )
PC Original PC value + 1
LBR a
Object code: 1100 aaaa aaaa aaaa
Condition: SF=1; PC
←
a ( branch condition satisified )
PC
a
a
a
a
a
a
a
a
a
a
a a
(for 4K/8K ROM)
SF=0 ; PC
←
PC + 2 ( branch condition not satisified )
PC
Original PC value + 2
SLBR a
Object code: 0101 0101 1100 aaaa aaaa aaaa (a : 1000 ~ 1FFFh)
0101 0111 1100 aaaa aaaa aaaa (a : 0000 ~ 0FFFh)
Condition: SF=1; PC
←
a ( branch condition satisified )
PC
a
a
a
a
a
a
a
a
a
a
a a
(only for 8K ROM)
SF=0 ; PC
←
PC + 2 ( branch condition not satisified )
PC
Original PC value + 2
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