EM73P461A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
TRGB (Time B overflow interrupt)
PC 0
PC 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
0
(for 4K ROM)
(for 8K ROM)
0
0
0
0
TBI (Time base interrupt)
PC 0
PC 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
0
0
1
(for 4K ROM)
(for 8K ROM)
INT1 (External interrupt from P8.0)
PC 0
PC 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
1
0
0
(for 4K ROM)
(for 8K ROM)
(4) Reset operation:
PC 0
PC 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
(for 4K ROM)
(for 8K ROM)
0
(5) Other operations:
For 1-byte instruction execution: PC + 1
For 2-byte instruction execution: PC + 2
ACCUMULATOR
Accumulator is a 4-bit data register for temporary data. For the arithematic, logic and comparative opertion
.., ACC plays a role which holds the source data and result.
FLAGS
There are four kinds of flag, CF ( Carry flag ), ZF ( Zero flag ), SF ( Status flag ) and GF ( General flag ),
these 4 1-bit flags are affected by the arithematic, logic and comparative .... operation.
All flags will be put into stack when an interrupt subroutine is served, and the flags will be restored after
RTI instruction executed.
* This specification are subject to be changed without notice.
12.27.2001
11
ELAN [ ELAN MICROELECTRONICS CORP ]
