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EM73P982 Datasheet(PDF) 5 Page - ELAN Microelectronics Corp

Part # EM73P982
Description  4-BIT MICROCONTROLLER
PDF  41 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM73P982 Datasheet(HTML) 5 Page - ELAN Microelectronics Corp

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* This specification are subject to be changed without notice.
EM73P982
EM73P982
EM73P982
EM73P982
EM73P982
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
4-BIT MICROCONTROLLER
12.25.2001
ZF CF SF
ALU
DATA BUS
PROGRAM EXAMPLE:
Check following arithematic operation for CF, ZF, SF
CF
ZF
SF
LDIA #00h;
-
1
1
LDIA #03h;
-
0
1
ADDA #05h;
-
0
1
ADDA #0Dh;
-
0
0
ADDA #0Eh;
-
0
0
ALU
ALU
ALU
ALU
ALU
The arithematic operation of 4 - bit data is performed in ALU unit. There are 2 flags can be affected by
the result of ALU operation, ZF and SF. The operation of ALU can be affected by CF only.
ALU STRUCTURE
ALU STRUCTURE
ALU STRUCTURE
ALU STRUCTURE
ALU STRUCTURE
ALU supported user arithematic operation function, including : addition, subtraction and rotaion.
ALU FUNCTION
ALU FUNCTION
ALU FUNCTION
ALU FUNCTION
ALU FUNCTION
(1) Addition:
For instruction ADDAM, ADCAM, ADDM #k, ADD #k,y .... ALU supports addition function.
The addition operation can affect CF and ZF. For addition operation, if the result is "0", ZF will be "1",
otherwise, not equal "0", ZF will be "0". When the addition operation has a carry-out, CF will be "1",
otherwise, CF will be "0".
EXAMPLE:
Operation
Carry
Zero
3+4=7
0
0
7+F=6
1
0
0+0=0
0
1
8+8=0
1
1



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