EM73P461A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
**** SYMBOL DESCRIPTION
Symbol
Description
H register
Symbol
Description
L register
HR
LR
PC
Program counter
DP
Data pointer
SP
ACC
CF
Stack pointer
Accumulator
Carry flag
STACK[SP]
FLAG
ZF
Stack specified by SP
All flags
Zero flag
SF
Status flag
GF
General flag
EI
MASK
ΤΑ
Enable interrupt register
Interrupt mask
Timer/counter A
IL
Interrupt latch
Port ( address : p )
Timer/counter B
PORT[p]
ΤΒ
RAM[HL]
ROM[DP]L
[DP]L
[DP]H
Data memory (address : HL )
Low 4-bit of program memory
Low 4-bit of data pointer register
High 4-bit of data pointer register
RAM[x]
ROM[DP]H
[DP]M
[TA]L([TB]L)
Data memory (address : x )
High 4-bit of program memory
Middle 4-bit of data pointer register
Low 4-bit of timer/counter A
(timer/counter B) register
High 4-bit of timer/counter A
(timer/counter B) register
Exchange
[TA]M([TB]M)
Middle 4-bit of timer/counter A
(timer/counter B) register
Transfer
[TA]H([TB]H)
←
↔
+
Addition
-
Substraction
&
Logic AND
Logic OR
^
Logic XOR
'
Inverse operation
.
x
p
r
Concatenation
#k
y
b
PC11-6
a5-0
4-bit immediate data
4-bit zero-page address
Bit address
Bit 11 to 6 of program counter
Bit 5 to 0 of destination address for
branch instruction
8-bit RAM address
4-bit or 5-bit port address
6-bit interrupt latch
Contents of bit assigned by bit
1 to 0 of LR
LR1-0
LR3-2
Bit 3 to 2 of LR
* This specification are subject to be changed without notice.
12.27.2001
38
ELAN [ ELAN MICROELECTRONICS CORP ]
