EM73201
4-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT
**** SYMBOL DESCRIPTION
Symbol
Description
H register
Program counter
Symbol
Description
L register
Data pointer
HR
PC
LR
DP
SP
Stack pointer
STACK[SP]
FLAG
ZF
Stack specified by SP
All flags
ACC
Accumulator
CF
SF
Carry flag
Status flag
Zero flag
General flag
GF
IL
EI
MASK
Enable interrupt register
Interrupt mask
Timer/counter A
Interrupt latch
Port ( address : p )
Timer/counter B
PORT[p]
ΤΒ
ΤΑ
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
RAM[x]
ROM[DP]H
[DP]M
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
High 4-bit of data pointer register [TA]L([TB]L)
[TA]M([TB]M)
Middle 4-bit of timer/counter A
(timer/counter B) register
Transfer
[TA]H([TB]H)
←
↔
+
Addition
Logic AND
-
Substraction
Logic OR
Inverse operation
&
^
Logic XOR
Concatenation
'
.
#k
y
4-bit immediate data
4-bit zero-page address
Bit address
x
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
p
b
r
PC11-6
a5-0
Bit 11 to 6 of program counter
Bit 5 to 0 of destination address for
branch instruction
LR 1-0
LR3-2
Bit 3 to 2 of LR
* This specification are subject to be changed without notice.
7.20.1999 30