ST7FLCD1 datasheet(20/95 Pages) STMICROELECTRONICS

20 / 95 page

Central Processing Unit (CPU)

ST7FLCD1

20/95

JRNH

Jump if H = 0

H = 0 ?

JRM

Jump if I = 1

I = 1 ?

JRNM

Jump if I = 0

I = 0 ?

JRMI

Jump if N = 1 (minus)

N = 1 ?

JRPL

Jump if N = 0 (plus)

N = 0 ?

JREQ

Jump if Z = 1 (equal)

Z = 1 ?

JRNE

Jump if Z = 0 (not equal)

Z = 0 ?

JRC

Jump if C = 1

C = 1 ?

JRNC

Jump if C = 0

C = 0 ?

JRULT

Jump if C = 1

Unsigned <

JRUGE

Jump if C = 0

Jump if unsigned > =

JRUGT

Jump if (C + Z = 0)

Unsigned >

JRULE

Jump if (C + Z = 1)

Unsigned < =

Load

DST < = SRC

reg, M

M, reg

MUL

Multiply

X,A = X * A

A, X, Y

X, Y, A

NEG

Negate (2's compl)

neg $10

reg, M

NOP

No Operation

OR operation

A = A + M

POP

Pop from the Stack

Pop reg

reg

Pop CC

PUSH

Push onto the Stack

Push Y

reg, CC

RCF

Reset carry flag

C = 0

RET

Subroutine Return

RIM

Enable Interrupts

I = 0

RLC

Rotate left true C

C < = DST < = C

reg, M

RRC

Rotate right true C

C = > DST = > C

reg, M

RSP

Reset Stack Pointer

S = Max allowed

SBC

Subtract with Carry

A = A - M - C

SCF

Set carry flag

C = 1

SIM

Disable Interrupts

I = 1

SLA

Shift left Arithmetic

C < = DST < = 0

reg, M

SLL

Shift left Logic

C < = DST < = 0

reg, M

SRL

Shift right Logic

0 = > DST = > C

reg, M

SRA

Shift right Arithmetic

DST7 = > DST = > C

reg, M

SUB

Subtraction

A = A - M

Table 5: Instruction Groups (Sheet 2 of 3)

Mnemo

Description

Function/Example

DST

SRC

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