Maxim Integrated MAXQ610 - Manual (Page 182)

14-15
MAXQ610 User’s Guide
OR Acc. Logical OR Carry Flag with Accumulator Bit
Description: Performs a logical-OR between the Carry (C) status flag and a specified bit of the active accumulator
(Acc .) and returns the result to the Carry .
Status Flags: C
Operation:
C ← C OR Acc.
Encoding: 15 0
1010 1010 bbbb 1010
Example(s): OR Acc .1 ; Acc .1=0 → C=0
OR Acc .2 ; Acc .2=1 → C=1
POP dst Pop Word from the Stack
Description: Pops a single word from the stack (@SP) to the specified dst and decreases the stack depth (incre-
ments the stack pointer SP) .
Status Flags: S, Z (if dst = Acc or AP or APC)
C, E (if dst = PSF)
Operation: dst ← @SP--
Encoding: 15 0
1ddd dddd 0000 1101
Example(s): POP GR ; GR ← 1234h
POP @DP[0] ; @DP[0] ← 76h (WBS0=0)
; @DP[0] ← 0876h (WBS0=1)
Stack Data:
xxxxh
xxxxh
← SP (after POP @DP[0])
0876h ← SP (after POP GR)
1234h ← SP (initial)
xxxxh
POPI dst Pop Word from the Stack Enable Interrupts
Description: Pops a single word from the stack (@SP) to the specified dst and decreases the stack depth (incre-
ments the stack pointer SP) . Additionally, POPI returns the interrupt logic to a state in which it can
acknowledge additional interrupts .
Status Flags: S, Z (if dst = Acc or AP or APC)
C, E (if dst = PSF)
Operation: dst ← @SP--
IPS ← 11b
Encoding: 15 0
1ddd dddd 1000 1101
Example(s): See POP