参数资料
型号: IDT723646L12PF8
厂商: IDT, Integrated Device Technology Inc
文件页数: 13/35页
文件大小: 0K
描述: IC FIFO SYNC 2048X36 128QFP
标准包装: 1,000
系列: 7200
功能: 同步
存储容量: 72K(2K x 36)
数据速率: 83MHz
访问时间: 12ns
电源电压: 4.5 V ~ 5.5 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 128-LQFP
供应商设备封装: 128-TQFP(14x20)
包装: 带卷 (TR)
其它名称: 723646L12PF8
20
COMMERCIAL TEMPERATURE RANGE
IDT723626/723636/723646 CMOS TRIPLE BUS SyncFIFO
WITH BUS-MATCHING 256 x 36 x 2, 512 x 36 x 2 and 1,024 x 36 x 2
Figure 9. Serial Programming of the Almost-Full Flag and Almost-Empty Flag Offset Values after Reset (IDT Standard and FWFT Modes)
NOTES:
1. tSKEW1 is the minimum time between the rising CLKA edge and a rising CLKC edge for
FFC/IRC to transition HIGH in the next cycle. If the time between the rising edge of CLKA
and rising edge of CLKC is less than tSKEW1, then
FFC/IRC may transition HIGH one CLKC cycle later than shown.
2. It is not necessary to program Offset register bits on consecutive clock cycles. FIFO write attempts are ignored until
FFA/IRA, FFC/IRC is set HIGH.
3. Programmable offsets are written serially to the SD input in the order
AFA offset (Y1), AEB offset (X1), AFC offset (Y2), and AEA offset (X2).
CLKA
FFA/IRA
tSENS
tSENH
FS0/SD(3)
tSPH
tSENS
tSENH
tFSS
tWFF
FS1/SEN
AEA Offset
(X2) LSB
tSDS
tSDH
tSDS
tSDH
AFA Offset
(Y1) MSB
MRS1,
MRS2
4
3271 drw10
tFSS
tFSH
CLKC
4
SPM
FFC/IRC
tWFF
tSKEW(1)
Figure 8. Parallel Programming of the Almost-Full Flag and Almost-Empty Flag Offset Values after Reset (IDT Standard and FWFT Modes)
3271 drw09
CLKA
MRS1,
MRS2
FFA/IRA
CLKC
FFC/IRC
A0-A35
FS1,FS0
ENA
tFSH
tWFF
tENH
tENS2
tSKEW1
tDS
tDH
tWFF
4
0,0
AFA Offset
(Y1)
AEB Offset
(X1)
AFC Offset
(Y2)
AEA Offset
(X2)
First Word to FIFO1
1
2
(1)
tFSH
tFSS
SPM
tFSS
NOTES:
1. tSKEW1 is the minimum time between the rising CLKA edge and a rising CLKC edge for
FFC/IRC to transition HIGH in the next cycle. If the time between the rising edge of CLKA
and rising edge of CLKC is less than tSKEW1, then
FFC/IRC may transition HIGH one CLKC cycle later than shown.
2.
CSA = LOW, W/RA = HIGH, MBA = LOW. It is not necessary to program Offset register on consecutive clock cycles.
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