DT72281_13 Datasheet, PDF (8/26 Pages) Integrated Device Technology – CMOS SuperSync FIFO

IDT72281/72291
CMOS SuperSync FIFO™ 65,536 x 9 and 131,072 x 9
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
TABLE 1 — STATUS FLAGS FOR IDT STANDARD MODE
Number of
Words in
FIFO
IDT72281
0
1 to n⁽¹⁾
(n + 1) to 32,768
32,769 to (65,536–(m+1))
(65,536–m)⁽²⁾ to 65,535
65,536
IDT72291
0
1 to n⁽¹⁾
(n + 1) to 65,536
65,537 to (131,072–(m+1))
(131,072–m)⁽²⁾ to 131,071
131,072
FF PAF HF PAE EF
H HH LL
H HH LH
H HHHH
H H LHH
H
L LHH
L
L LHH
NOTES:
1. n = Empty Offset, Default Values: n = 127 when parallel offset loading is selected or n = 1,023 when serial offset loading is selected.
2. m = Full Offset, Default Values: m = 127 when parallel offset loading is selected or m = 1,023 when serial offset loading is selected.
TABLE 2 — STATUS FLAGS FOR FWFT MODE
Number of
Words in
FIFO
IDT72281
0
1 to n+ 1⁽¹⁾
(n + 2) to 32,769
32,770 to (65,537–(m+1))⁽²⁾
(65,537–m)⁽²⁾ to 65,536
65,537
IDT72291
0
1 to n+ 1⁽¹⁾
(n + 2) to 65,537
65,538 to (131,073–(m+1))⁽²⁾
(131,073–m)⁽²⁾ to 131,072
131,073
FF PAF HF PAE EF
L HH LH
L HH LL
L HHHL
L H LHL
L
L LHL
H
L LHL
NOTES:
1. n = Empty Offset, Default Values: n = 127 when parallel offset loading is selected or n = 1,023 when serial offset loading is selected.
2. m = Full Offset, Default Values: m = 127 when parallel offset loading is selected or m = 1,023 when serial offset loading is selected.
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