CDP1805ACE datasheet(21/30 Pages) INTERSIL

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SET Q

SEQ

→ Q

RESET Q

REQ

→ Q

PUSH X, P TO STACK

MARK

(X, P)

→ T; (X, P) → M(R(2)),

THEN P

→ X; R(2) → 1→ R(2)

TIMER/COUNTER INSTRUCTIONS

LOAD COUNTER

LDC

6806

(Note 15)

CNTR STOPPED: D

→ CH, CNTR;

→ CI. CNTR RUNNING; D → CH

GET COUNTER

GEC

6808

CNTR

→ D

STOP COUNTER

STPC

6800

STOP CNTR CLOCK;

→ ÷ 32 PRESCALER

DECREMENT TIMER/COUNTER

DTC

6801

CNTR - 1

→ CNTR

SET TIMER MODE AND START

STM

6807

TPA

÷ 32 → CNTR

SET COUNTER MODE 1 AND

START

SCM1

6805

EF1

→ CNTR CLOCK

SET COUNTER MODE 2 AND

START

SCM2

6803

EF2

→ CNTR CLOCK

SET PULSE WIDTH MODE 1 AND

START

SPM1

6804

TPA.EF1

→ CNTR CLOCK;

EF1

STOPS COUNT

SET PULSE WIDTH MODE 2 AND

START

SPM2

6802

TPA.EF2

→ CNTR CLOCK;

EF2

STOPS COUNT

ENABLE TOGGLE Q

ETQ

6809

(Note 15)

IF CNTR = 01

• NEXT CNTR CLOCK

; Q

→ Q

INTERRUPT CONTROL

EXTERNAL INTERRUPT ENABLE

XIE

680A

→ XIE

EXTERNAL INTERRUPT DISABLE

XID

680B

→ XIE

COUNTER INTERRUPT ENABLE

CIE

680C

→ CIE

COUNTER INTERRUPT DISABLE

CID

680D

→ CIE

RETURN

RET

M(R(X))

→ X, P; R(X) + 1 → R(X); 1 → MIE

DISABLE

DIS

M(R(X)

→ X, P; R(X) + 1 → R(X); 0 → MIE

SAVE

SAV

→ M(R(X))

SAVE T, D, DF

DSAV

6876

(Note 10)

R(X) - 1

→ R(X), T → M(R(X)),

R(X) - 1

→ R(X), D → M (R(X)),

R(X) - 1

→ R(X), SHIFT D

RIGHT WITH CARRY, D

→ M(R(X))

INPUT-OUTPUT BYTE TRANSFER

OUTPUT 1

OUT 1

M(R(X))

→ BUS; R(X) + 1 → R(X)

N LINES = 1

OUTPUT 2

OUT 2

M(R(X))

→ BUS; R(X) + 1 → R(X)

N LINES = 2

OUTPUT 3

OUT 3

M(R(X))

→ BUS; R(X) + 1 → R(X)

N LINES = 3

OUTPUT 4

OUT 4

M(R(X))

→ BUS; R(X) + 1 → R(X)

N LINES = 4

OUTPUT 5

OUT 5

M(R(X))

→ BUS; R(X) + 1 → R(X)

N LINES = 5

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

INSTRUCTION

NO. OF

MACHINE

CYCLES

MNEMONIC

OP CODE

OPERATION

CDP1805AC, CDP1806AC

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