HT47C20 Holtek Semiconductor Inc, HT47C20 Datasheet - Page 47

• Manufacturer Part Number: HT47C20
• Description: 8-Bit Microcontroller
• Manufacturer: Holtek Semiconductor Inc

RET A,x
Description
Operation
Affected flag(s)
RETI
Description
Operation
Affected flag(s)
RL [m]
Description
Operation
Affected flag(s)
RLA [m]
Description
Operation
Affected flag(s)
Return and place immediate data in accumulator
The program counter is restored from the stack and the accumulator
loaded with the specified 8-bit immediate data.
PC ¬ Stack
ACC ¬ x
Return from interrupt
The program counter is restored from the stack, and interrupts enabled
by setting the EMI bit. EMI is the enable master (global) interrupt bit
(bit 0; register INTC).
PC ¬ Stack
EMI ¬ 1
Rotate data memory left
The contents of the specified data memory is rotated left one bit with bit
7 rotated into bit 0.
[m].(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0-6)
[m].0 ¬ [m].7
Rotate data memory left and place result in accumulator
Data in the specified data memory is rotated left one bit with bit 7 ro-
tated into bit 0, leaving the rotated result in the accumulator. The con-
tents of the data memory remain unchanged.
ACC.(i+1) ¬ [m].i; [m].i:bit i of the data memory (i=0-6)
ACC.0 ¬ [m].7
TC2
TC2
TC2
TC2
¾
¾
¾
¾
TC1
TC1
TC1
TC1
¾
¾
¾
¾
TO
TO
TO
TO
¾
¾
¾
¾
47
PD
PD
PD
PD
¾
¾
¾
¾
OV
OV
OV
OV
¾
¾
¾
¾
¾
¾
¾
¾
Z
Z
Z
Z
AC
AC
AC
AC
¾
¾
¾
¾
¾
¾
¾
¾
C
C
C
C
January 18, 2000
HT47C20