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KS86C6004/C6008/P6008 MICROCONTROLLER (Preliminary Spec)
SAM87RI INSTRUCTION SET
6–19
DEC
— Decrement
DEC
dst
Operation:
dst
←
dst – 1
The contents of the destination operand are decremented by one.
Flags:
C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if result is negative; cleared otherwise.
V: Set if arithmetic overflow occurred, that is, dst value is –128(80H) and result value is
+127(7FH); cleared otherwise.
D: Unaffected.
H: Unaffected.
Format:
Bytes
Cycles
Opcode
(Hex)
Addr Mode
dst
opc
dst
2
6
00
R
01
IR
Examples:
Given: R1 = 03H and register 03H = 10H:
DEC
R1
→
R1 = 02H
DEC
@R1
→
Register 03H = 0FH
In the first example, if working register R1 contains the value 03H, the statement "DEC R1"
decrements the hexadecimal value by one, leaving the value 02H. In the second example, the
statement "DEC @R1" decrements the value 10H contained in the destination register 03H by
one, leaving the value 0FH.
Содержание KS86C6004
Страница 19: ...ADDRESS SPACES KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec 2 8 NOTES ...
Страница 61: ...CONTROL REGISTERS KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec 4 30 NOTES ...
Страница 120: ...CLOCK CIRCUIT KS86C6004 C6008 P6008 MICROCONTROLLERS Preliminary Spec 7 4 NOTES ...
Страница 134: ...I O PORTS KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec 9 10 NOTES ...
Страница 143: ...KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec BASIC TIMER and TIMER 0 10 9 NOTES ...
Страница 162: ...KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec ELECTRICAL DATA 12 9 ...
Страница 164: ...KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec ELECTRICAL DATA 12 11 NOTES ...
Страница 172: ...KS86P6008 OTP KS86C6004 C6008 P6008 MICROCONTROLLER Preliminary Spec 14 6 NOTES ...