LC72346/347 Series Instruction Set

Terminology

ADDR

: Program memory address

b

: Borrow

C

: Carry

DH

: Data memory address High (Row address) [2 bits]

DL

: Data memory address Low (Column address) [4 bits]

I

: Immediate data [4 bits]

M

: Data memory address

N

: Bit position [4 bits]

Rn

: Resister number [4 bits]

Pn

: Port number [4 bits]

PW

: Port control word number [4 bits]

r

: General register (One of the addresses from 00H to 0FH of BANK0)

( ), [ ]

: Contents of register or memory

M (DH, DL) : Data memory specified by DH, DL

No. 6651-10/12

LC72346W, 72347W

Mnemonic

Operand

Function

Operations function

Instruction format

1st

2nd

AD

r

M

Add M to r

R

← (r) + (M)

ADS

r

M

Add M to r, then skip if carry

R

← (r) + (M), skip if carry

AC

r

M

Add M to r with carry

R

← (r) + (M) + C

ACS

r

M

Add M to r with carry,

R

← (r) + (M) + C

then skip if carry

skip if carry

AI

M

I

Add I to M

M

← (M) + I

AIS

M

I

Add I to M, then skip if carry

M

← (M) + I, skip if carry

AIC

M

I

Add I to M with carry

M

← (M) + I + C

AICS

M

I

Add I to M with carry,

M

← (M) + I + C,

then skip if carry

skip if carry

SU

r

M

Subtract M from r

R

← (r) – (M)

SUS

r

M

Subtract M from r,

R

← (r) – (M),

then skip if borrow

skip if borrow

SB

r

M

Subtract M from r with borrow

R

← (r) – (M) – b

SBS

r

M

Subtract M from r with borrow,

R

← (r) – (M) – b,

then skip if borrow

skip if borrow

SI

M

I

Subtract I from M

M

← (M) – I

SIS

M

I

Subtract I from M,

M

← (M) – I,

then skip if borrow

skip if borrow

SIB

M

I

Subtract I from M with borrow

M

← (M) – I – b

SIBS

M

I

Subtract I from M with borrow,

M

← (M) – I – b,

then skip if borrow

skip if borrow

SEQ

r

M

Skip if r equal to M

(r) – (M), skip if zero

SEQI

M

I

Skip if M equal to I

(M) – I, skip if zero

SNEI

M

I

Skip if M not equal to I

(M) – I, skip if not zero

SGE

r

M

Skip if r is greater than or

(r) – (M),

equal to M

skip if not borrow

SGEI

M

I

Skip if M is greater than

(M) – I, skip if not borrow

equal to I

SLEI

M

I

Skip if M is less than I

(M) – I, skip if borrow

f

e

d

c

b

a

9

8

7

6

5

4

3

2

1

0

0

1

0

0

0

0

DH

DL

r

0

1

0

0

0

1

DH

DL

r

0

1

0

0

1

0

DH

DL

r

0

1

0

0

1

1

DH

DL

r

0

1

0

1

0

0

DH

DL

I

0

1

0

1

0

1

DH

DL

I

0

1

0

1

1

0

DH

DL

I

0

1

0

1

1

1

DH

DL

I

0

1

1

0

0

0

DH

DL

r

0

1

1

0

0

1

DH

DL

r

0

1

1

0

1

0

DH

DL

r

0

1

1

0

1

1

DH

DL

r

0

1

1

1

0

0

DH

DL

I

0

1

1

1

0

1

DH

DL

I

0

1

1

1

1

0

DH

DL

I

0

1

1

1

1

1

DH

DL

I

0

0

0

1

0

0

DH

DL

r

0

0

0

1

1

0

DH

DL

I

0

0

0

0

0

1

DH

DL

I

0

0

0

1

1

0

DH

DL

r

0

0

0

1

1

1

DH

DL

I

0

0

0

0

1

1

DH

DL

I

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