UPD63AGS NEC, UPD63AGS Datasheet - Page 46

• Manufacturer Part Number: UPD63AGS
• Description: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
• Manufacturer: NEC

46
STTS #data4
SCAF (Set Carry If A
NOP
<1> Instruction code :
<2> Cycle count
<3> Function
<1> Instruction code :
<2> Cycle count
<3> Function
<1> Instruction code :
<2> Cycle count
<3> Function
of the statuses coincides with the bits that have been set, the status flag F is set (to 1).
If none of them coincide, the status flag F is cleared (to 0).
Remark
No operation
Compares the S
Sets the carry flag CY (to 1) if the accumulator contents are FH.
The accumulator values after executing the SCAF instruction are as follows:
0111
1111
Before execution
011
01
0
Accumulator Value
: don’t care
CC
0
= F
, S
:
: 1
: if statuses match F
: 1
: if A = 0FH CY
: 1
: PC
H
1
else F
else CY
0 0 0 1 1 1 0 0 0 1
0 0 0 0 0 0 d
1 1 0 1 0 1 0 0 1 1
0 0 0 0 0 0 0 0 0 0
, K
)
0000
0001
0011
0111
1111
After execution
I/O
, K
PC + 1
I
, and TIMER statuses with the immediate data contents. If at least one
0
0
3
d
2
d
1
d
0
1
0 (clear)
0 (clear)
0 (clear)
0 (clear)
1 (set)
1
Carry Flag
PD63, 63A, 64