IDT72511/IDT72521
BIDIRECTIONAL FIRST-IN FIRST-OUT MEMORY
A→B FIFO WRITE FLOW-THROUGH
DSA
DA0 - DA17
A→B
Full Flag(1)
RB (or DSB)
tb LZ
DB0 - DB17
DATA OUT
tbA
NOTES:
1. Assume the flag pin is programmed active LOW.
2. R/WA = 0
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ta WPW
tRFF
tb DV
tb HZ
DATA INPUTS
taDS
ta DH
tWFF
B→A FIFO READ FLOW-THROUGH
DSA
taLZ
DA0 - DA17
B→A
Empty Flag (1)
WB (or DSB)
DB0 - DB17
DATA INPUT
tb DS
NOTES:
1. Assume the flag pin is programmed active LOW.
2. R/WA = 1
taA
t WEF
tbDH
taRPW
ta DV
DATA OUTPUT
ta HZ
tREF
2668 drw 15
Figure 14. Port A Read and Write Flow-Through Timing, Processor Interface Mode Only
5.32
21