4-60

Strobe to Data Access

5

50

200

300

50

200

300

ns

10

25

100

150

-

-

-

ns

Minimum Strobe Width

5

-

150

225

-

150

225

ns

10

-

75

115

-

-

-

ns

NOTES:

1. Maximum limits of minimum characteristics are the values above which all devices function.

(NOTE 1)

PARAMETER

(V)

LIMITS

UNITS

CDP1855

CDP1855C

MIN

(NOTE 2)

TYP

MAX

MIN

(NOTE 2)

TYP

MAX

Timing Diagrams

FIGURE 7. OPERATION TIMING DIAGRAM

FIGURE 8. WRITE TIMING DIAGRAM

SHIFT

CLK

(PRESCALER OFF)

12

9

12

9

RA0-2

STB

RD/WE

CE

CLEAR

* WRITE IS OVERLAP OF CE = 1, RD/WE = 0, AND STB = 1.

CDP1855, CDP1855C