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8XC196MC, MD, MH USER'S MANUAL
Mnemonic
EXTB
SIGN-EXTEND SHORT-INTEGER INTO
INTEGER. Sign-extends the low-order byte
of the operand throughout the high-order byte
of the operand.
if DEST.7 = 1 then
(high byte DEST)
else
(high byte DEST)
end_if
Z
IDLPD
IDLE/POWERDOWN. Depending on the 8-bit
value of the KEY operand, this instruction
causes the device to:
•
enter idle mode, if KEY=1,
•
enter powerdown mode, if KEY=2,
•
execute a reset sequence,
if KEY = any value other than 1 or 2.
The bus controller completes any prefetch
cycle in progress before the CPU stops or
resets.
if KEY = 1 then
enter idle
else if KEY = 2 then
enter powerdown
else
execute reset
Z
—
0
INC
INCREMENT WORD. Increments the value
of the word operand by 1.
←
(DEST)
Z
A-16
Table A-6. Instruction Set (Continued)
Operation
←
0FFH
←
0
PSW Flag Settings
N
C
V
VT
0
0
—
PSW Flag Settings
N
C
V
VT
KEY = 1 or 2
—
—
—
—
KEY = any value other than
1 or 2
0
0
0
0
(DEST) + 1
PSW Flag Settings
N
C
V
VT
↑
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Instruction Format
EXTB
wreg
(00010110) (wreg)
ST
—
IDLPD
#key
(11110110) (key)
ST
—
0
INC
wreg
(00000111) (wreg)
ST
0
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