ht827a0 Holtek Semiconductor Inc., ht827a0 Datasheet - Page 39

• Manufacturer Part Number: ht827a0
• Description: 8-bit Microcontroller With Voice Rom
• Manufacturer: Holtek Semiconductor Inc.

RET
Description
Operation
Affected flag(s)
RET A,x
Description
Operation
Affected flag(s)
RETI
Description
Operation
Affected flag(s)
RL [m]
Description
Operation
Affected flag(s)
Return from subroutine
The program counter is restored from the stack. This is a two-cycle instruc-
tion.
PC ¬ Stack
Return and place immediate data in the accumulator
The program counter is restored from the stack and the accumulator is
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 an enable master (global) interrupt bit (bit 0; reg-
ister INTC).
PC ¬ Stack
EMI ¬ 1
Rotate data memory left
The contents of the specified data memory are rotated 1 bit to the left 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
TC2
TC2
TC2
TC2
¾
¾
¾
¾
TC1
TC1
TC1
TC1
¾
¾
¾
¾
TO
TO
TO
TO
¾
¾
¾
¾
PD
PD
PD
PD
¾
¾
¾
¾
39
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
March 15, 2000
HT827A0