Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 225)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 16-15

OR Acc.<b> 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.<b>) and returns the result to the Carry.

Status Flags:

Operation:

C ← C OR Acc.<b>

Encoding:

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:

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

← 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:

1ddd dddd 1000 1101

Example(s):

See POP

1 2 ... 220 221 222 223 224 225 226 227 228 229 230 ... 254 255

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