6

COMMERCIAL TEMPERATURE RANGE

IDT72125PARALLEL-TO-SERIALCMOSFIFO

1,024 x 16

Figure 2. Write Operation

Figure 3. Read Operation

Figure 4. Full Flag from Last Write to First Read

Figure 5. Empty Flag from Last Read to First Write

NOTE:

1. SOCP should not be clocked until EF goes HIGH.

2665 drw05

W

SOCP

SO

SO

0

1

(First Device in Width Expansion Mode)

(Single Device Mode or Second

Device in Width Expansion Mode)

n-1

2665 drw06

SOCP

W

FF

LAST WRITE

IGNORED

WRITE

FIRST READ

ADDITIONAL READS

FIRST WRITE

0

1

n-1

0

1

n-1

2665 drw07

2665 drw08

SOCP

W

EF

LAST READ

NO READ

FIRST WRITE

ADDITIONAL

WRITES

FIRST READ

0

1

n-1

0

1

n-1

NOTE 1

SO

VALID

VALID

VALID

NOTE:

1. In Single Device Mode, SO will not tri-state except after reset.