7

FN1441.3

October 17, 2008

Timing Waveforms

FETCH (READ)

EXECUTE (WRITE)

00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71 00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71 00

HI BYTE

LOW BYTE

HI BYTE

LOW BYTE

CLOCK

ADDRESS

TPA

TPB

MRD

MWR

DATA

VALID INPUT DATA

VALID OUTPUT DATA

FIGURE 1. BASIC DC TIMING WAVEFORM, ONE INSTRUCTION CYCLE

CDP1802AC/3

CDP1802AC/3