参数资料
型号: IDT72V255LA20TF
厂商: IDT, Integrated Device Technology Inc
文件页数: 27/27页
文件大小: 0K
描述: IC FIFO SS 8192X18 20NS 64-STQFP
标准包装: 80
系列: 72V
功能: 同步
存储容量: 144K(8K x 18)
访问时间: 20ns
电源电压: 3 V ~ 3.6 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-TQFP(10x10)
包装: 托盘
其它名称: 72V255LA20TF
9
IDT72V255LA/72V265LA 3.3 VOLT CMOS SuperSync FIFO
8,192 x 18, 16,384 x 18
COMMERCIAL AND INDUSTRIAL
TEMPERATURE RANGES
OCTOBER 22, 2008
Figure 4. Programmable Flag Offset Programming Sequence
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.
Figure 3. Offset Register Location and Default Values
EMPTY OFFSET REGISTER
17
0
07FH if LD is LOW at Master Reset,
3FFH if LD is HIGH at Master Reset
FULL OFFSET REGISTER
17
0
DEFAULT VALUE
07FH if LD is LOW at Master Reset,
3FFH if LD is HIGH at Master Reset
12
IDT72V255LA
8,192 x 18 - BIT
4672 drw 06
EMPTY OFFSET REGISTER
17
0
07FH if LD is LOW at Master Reset,
3FFH if LD is HIGH at Master Reset
FULL OFFSET REGISTER
17
0
DEFAULT VALUE
07FH if LD is LOW at Master Reset,
3FFH if LD is HIGH at Master Reset
13
IDT72V265LA
16,384 x 18 - BIT
Selection
Parallel write to registers:
Empty Offset
Full Offset
Parallel read from registers:
Empty Offset
Full Offset
No Operation
Write Memory
Read Memory
No Operation
4672 drw 07
LD
0
X
1
0
WEN
0
1
0
X
1
REN
1
0
1
X
0
1
Serial shift into registers:
26 bits for the 72V255LA
28 bits for the 72V265LA
SEN
1
X
0
WCLK
X
RCLK
X
1 bit for each rising WCLK edge
Starting with Empty Offset (LSB)
Ending with Full Offset (MSB)
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