CDP1805AC View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

CDP1805AC

CMOS 8-Bit Microprocessor with On-Chip RAM and Counter/Timer

Intersil 

CDP1805AC, CDP1806AC

TABLE 1. INSTRUCTION SUMMARY (SEE NOTES) (Continued)

INSTRUCTION

NO. OF

MACHINE

CYCLES

MNEMONIC

OP CODE

OPERATION

DECIMAL SUBTRACT MEMORY

4

WITH BORROW, IMMEDIATE

DSBI

687F

D - M(R(P)) - (NOT DF) → DF, D

R(P) + 1 → R(P)

DECIMAL ADJUST → DF, D

BRANCH INSTRUCTIONS - SHORT BRANCH

SHORT BRANCH

2

BR

30

M(R(P)) → R(P).0

NO SHORT BRANCH (See SKP)

2

NBR

38

R(P) + 1 → R(P)

(Note 11)

SHORT BRANCH IF D = 0

2

BZ

32

IF D = 0, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

SHORT BRANCH IF D NOT 0

2

BNZ

3A

IF D NOT 0, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

SHORT BRANCH IF DF = 1

2

BDF

33

IF DF = 1, M(R(P)) → R(P).0

(Note 11) ELSE R(P) + 1 → R(P)

SHORT BRANCH IF POS OR ZERO

2

BPZ

33

IF DF = 1, M(R(P)) → R(P).0

(Note 11) ELSE R(P) + 1 → R(P)

SHORT BRANCH IF EQUAL OR

2

GREATER

BGE

33

IF DF = 1, M(R(P)) → R(P).0,

(Note 11) ELSE R(P) + 1 → R(P)

SHORT BRANCH IF DF = 0

2

BNF

3B

IF D = 0, M(R(P)) → R(P).0,

(Note 11) ELSE R(P) + 1 → R(P)

SHORT BRANCH IF MINUS

2

BM

3B

IF D = 0, M(R(P)) → R(P).0,

(Note 11) ELSE R(P) + 1 → R(P)

SHORT BRANCH IF LESS

2

BL

3B

IF D = 0, M(R(P)) → R(P).0,

(Note 11) ELSE R(P) + 1 → R(P)

SHORT BRANCH IF Q = 1

2

BQ

31

IF Q = 1, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

SHORT BRANCH IF Q = 0

2

BNQ

39

IF Q = 0, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

SHORT BRANCH IF EF1 = 1

2

(EF1 = VSS)

SHORT BRANCH IF EF1 = 0

2

(EF1 = VDD)

SHORT BRANCH IF EF2 = 1

2

(EF2 = VSS)

SHORT BRANCH IF EF2 = 0

2

(EF2 = VDD)

SHORT BRANCH IF EF3 = 1

2

(EF3 = VSS)

SHORT BRANCH IF EF3 = 0

2

(EF3 = VDD)

SHORT BRANCH IF EF4 = 1

2

(EF4 = VSS)

SHORT BRANCH IF EF4 = 0

2

(EF4 = VDD)

SHORT BRANCH ON COUNTER

3

INTERRUPT

B1

34

IF EF1 = 1, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

BN1

3C

IF EF1 = 0, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

B2

35

IF EF2 = 1, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

BN2

3D

IF EF2 = 0, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

B3

36

IF EF3 = 1, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

BN3

3E

IF EF3 = 0, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

B4

37

IF EF4 = 1, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

BN4

3F

IF EF4 = 0, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

BCI

683E IF CI = 1, M(R(P)) → R(P).0; 0 → CI

(Note 12) ELSE R(P) + 1 → R(P)

SHORT BRANCH ON EXTERNAL

3

INTERRUPT

BXI

683F IF XI = 1, M(R(P)) → R(P).0

ELSE R(P) + 1 → R(P)

19

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