參數(shù)資料
型號(hào): UPD17P136BGT
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PDSO28
封裝: 0.375 INCH, PLASTIC, SOP-28
文件頁(yè)數(shù): 13/25頁(yè)
文件大?。?/td> 666K
代理商: UPD17P136BGT
20
IDT72V205/72V215/72V225/72V235/72V245 3.3V CMOS SyncFIFOTM
256 x 18, 512 x 18, 1,024 x 18, 2,048 x 18 and 4,096 x 18
COMMERCIALANDINDUSTRIAL
TEMPERATURERANGES
Figure 25. Write Cycle Timing with Double Register-Buffered
FF (IDT Standard Mode)
NOTES:
1. tSKEW1 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that
FF will go HIGH after one WCLK cycle plus tWFF. If the time between the rising
edge of RCLK and the rising edge of WCLK is less than tSKEW1, then the
FF deassertion time may be delayed an extra WCLK cycle.
2.
LD = HIGH.
3. Select this mode by setting (
FL, RXI, WXI) = (0,1,0) or (1,1,0) during Reset.
Figure 24. Double Register-Buffered Full Flag Timing (IDT Standard Mode)
NOTES:
1. tSKEW1 is the minimum time between a rising RCLK edge and a rising WCLK edge to guarantee that
FF will go HIGH after one WCLK cycle plus tRFF. If the time between the rising
edge of RCLK and the rising edge of WCLK is less than tSKEW1. then the
FF deassertion may be delayed an extra WCLK cycle.
2.
LD = HIGH.
3. Select this mode by setting (
FL, RXI, WXI) = (0,1,0) or (1,1,0) during Reset.
WCLK
D0 - D17
WEN
FF
RCLK
REN
tDS
tWFF
DATA IN VALID
NO OPERATION
(1)
tSKEW1
4294 drw 25
tENS
tDH
tENH
1
2
tCLKH
tCLKL
tCLK
D0 - D17
WEN
RCLK
FF
REN
tENH
Q0 - Q17
DATA READ
NEXT DATA READ
DATA IN OUTPUT REGISTER
LOW
OE
tSKEW1
DATA WRITE
4294 drw 24
WCLK
NO WRITE
1
2
1
2
tDS
NO WRITE
tWFF
tA
tENS
tSKEW1
tDS
tA
Wd
(1)
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