EM73PA88A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
**** SYMBOL DESCRIPTION
Symbol
Description
H register
Symbol
Description
L register
HR
LR
PC
SP
ACC
CF
Program counter
Stack pointer
Accumulator
DP
Data pointer
Stack specified by SP
All flags
STACK[SP]
FLAG
ZF
Carry flag
Zero flag
SF
IL
Status flag
Interrupt latch
Port ( address : p )
Timer/counter B
Data memory (address : x )
High 4-bit of program memory
EI
MASK
ΤΑ
RAM[HL]
ROM[DP]L
[DP]L
Enable interrupt register
Interrupt mask
Timer/counter A
PORT[p]
ΤΒ
RAM[x]
ROM[DP]H
[DP]M
Data memory (address : HL )
Low 4-bit of program memory
Low 4-bit of data pointer register
High 4-bit of data pointer register
Middle 4-bit of timer/counter A
(timer/counter B) register
Contents of bit assigned by bit
1 to 0 of LR
Middle 4-bit of data pointer register [DP]H
[TA]L([TB]L) Low 4-bit of timer/counter A
(timer/counter B) register
[TA]H([TB]H) High 4-bit of timer/counter A
(timer/counter B) register
[TA]M([TB]M)
LR 1-0
LR3-2
Bit 3 to 2 of LR
a5-0
Bit 5 to 0 of destination address for
branch instruction
PC12-6
↔
-
Bit 12 to 6 of program counter
Exchange
Substraction
←
+
&
^
Transfer
Addition
Logic AND
Logic XOR
Logic OR
Inverse operation
4-bit immediate data
4-bit zero-page address
Bit address
.
Concatenation
#k
y
b
x
p
r
8-bit RAM address
4-bit or 5-bit port address
6-bit interrupt latch
* This specification are subject to be changed without notice.
10.8.2001
45
ELAN [ ELAN MICROELECTRONICS CORP ]
