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IDT72V271LA20TFI Datasheet(PDF) 9 Page - Integrated Device Technology

Part # IDT72V271LA20TFI
Description  3.3 VOLT CMOS SuperSync FIFO
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT72V271LA20TFI Datasheet(HTML) 9 Page - Integrated Device Technology

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IDT72V261LA/72V271LA
3.3 VOLT CMOS SuperSync FIFO™ 16,384 x 9 and 32,768 x 9
9
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
Figure 4. Programmable Flag Offset Programming Sequence
Figure 3. Offset Register Location and Default Values
EMPTY OFFSET (LSB) REG.
87
0
EMPTY OFFSET (MSB) REG.
00H
85
0
FULL OFFSET (LSB) REG.
87
0
FULL OFFSET (MSB) REG.
00H
8
5
0
DEFAULT VALUE
07FH if
LD is LOW at Master Reset
3FFH if
LD is HIGH at Master Reset
DEFAULT VALUE
07FH if
LD is LOW at Master Reset
3FFH if
LD is HIGH at Master Reset
EMPTY OFFSET (LSB) REG.
DEFAULT VALUE
07FH if
LD is LOW at Master Reset
3FFH if
LD is HIGH at Master Reset
8
7
0
EMPTY OFFSET (MSB) REG.
00H
8
6
0
4673 drw 06
FULL OFFSET (LSB) REG.
8
7
0
FULL OFFSET (MSB) REG.
00H
8
6
0
DEFAULT VALUE
07FH if
LD is LOW at Master Reset
3FFH if
LD is HIGH at Master Reset
IDT72V261LA
 16,384 x 9 − BIT
IDT72V271LA
 32,768 x 9 − BIT
WCLK
RCLK
Selection
X
Parallel write to registers:
Empty Offset (LSB)
Empty Offset (MSB)
Full Offset (LSB)
Full Offset (MSB)
X
Parallel read from registers:
Empty Offset (LSB)
Empty Offset (MSB)
Full Offset (LSB)
Full Offset (MSB)
X
X
No Operation
X
Write Memory
X
Read Memory
X
X
No Operation
4673 drw 07
LD
0
0
X
1
1
1
0
WEN
0
1
1
0
X
1
1
REN
1
0
1
X
0
1
1
X
Serial shift into registers:
28 bits for the 72V261LA
SEN
1
1
1
X
X
X
0
30 bits for the 72V271LA
1 bit for each rising WCLK edge
Starting with Empty Offset (LSB)
Ending with Full Offset (MSB)
NOTES:
1. The programming method can only be selected at Master Reset.
2. Parallel reading of the offset registers is always permitted regardless of which programming method has been selected.
3. The programming sequence applies to both IDT Standard and FWFT modes.


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