EM73P361A
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
SF=0 ; PC ← PC + 2 ( branch condition not satisified )
PC
Original PC value + 2
(2) Subroutine instruction:
SCALL a
Object code: 1110 nnnn
Condition : PC ← a ; a=8n+6 ; n=1..15 ; a=86h, n=0
PC 0 0 0 0 a
LCALL a
Object code: 0100 0aaa aaaa aaaa
Condition: PC ← a
a
a
a a
a
a
a
a
a
PC 0
a
a
a
a
a
a
a
a
a
RET
Object code: 0100 1111
Condition: PC ← STACK[SP]; SP + 1
PC
The return address stored in stack
RT I
Object code: 0100 1101
Condition : FLAG. PC ← STACK[SP]; EI ← 1; SP + 1
PC
The return address stored in stack
(3) Interrupt acceptance operation:
When an interrupt is accepted, the original PC is pushed into stack and interrupt vector will be loaded into
PC,The interrupt vectors are as following:
INT0 (External interrupt from P0.2)
PC 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
0
1
1
0
1
0
0
0
0
TRGA (Timer A overflow interrupt)
PC 0
0
0
0
0
0
0
0
TRGB (Time B overflow interrupt)
PC 0
TBI (Time base interrupt)
PC 0
0
0
0
0
0
0
0
0
* This specification are subject to be changed without notice.
12.17.2001
8
ELAN [ ELAN MICROELECTRONICS CORP ]
