CY7C4811-15AIT Cypress Semiconductor Corp, CY7C4811-15AIT Datasheet - Page 12

• Manufacturer Part Number: CY7C4811-15AIT
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C4811-15AIT

• Lead Free Status / Rohs Status: Not Compliant

Switching Waveforms
Document #: 38-06005 Rev. *A
WCLKA,WCLKB
WENA1(WENB1)
WENA2(WENB2)
(if applicable)
PAEA(PAEB)
RCLKA(RCLKB)
RENA1, RENA2
(RENB1,RENB2)
Programmable Almost Empty Flag Timing
Programmable Almost Full Flag Timing
RENA1, RENA2
(RENB1,RENB2)
WCLKA,WCLKB
WENA1(WENB1)
WENA2(WENB2)
(if applicable)
PAFA(PAFB)
RCLKA(RCLKB)
Notes:
18. t
19. (PAEA,PAEB) offset = n.
20. If a read is preformed on this rising edge of the read clock, there will be Empty + (n-1) words in the FIFO when (PAEA,PAEB) goes LOW.
21. If a write is performed on this rising edge of the write clock, there will be Full - (m-1) words of the FIFO when (PAFA,PAFB) goes LOW.
22. (PAFA,PAFB) offset = m.
23. 256-m words in FIFO for CY7C4801, 512-m words for CY7C4811, 1024-m words for CY7C4821, 2048-m words for CY7C4831, 4096-m words for CY7C4841,
24. t
between the edge of (WCLKA,WCLKB) and the rising (RCLKA,RCLKB) is less than t
8192-m words for CY7C4851.
between the rising edge of (RCLKA,RCLKB) and the rising edge of (WCLKA,WCLKB) is less than t
(WCLKA,WCLKB).
SKEW2
SKEW2
is the minimum time between a rising (WCLKA,WCLKB) and a rising (RCLKA,RCLKB) edge for (PAEA,PAEB) to change state during that clock cycle. If the time
is the minimum time between a rising (RCLKA,RCLKB) edge and a rising (WCLKA,WCLKB) edge for (PAFA,PAFB) to change during that clock cycle. If the time
t
t
CLKH
CLKH
FULL
(continued)
t
SKEW2
IN FIFO
M+1 WORDS
t
t
t
t
ENS
ENS
ENS
ENS
[18]
t
t
t
t
ENH
ENH
ENH
ENH
t
t
CLKL
CLKL
t
Note
PAE
19
Note
Note
21
22
SKEW2
t
PAF
, then (PAEA,PAEB) may not change state until the next RCLK.
t
ENS
SKEW2
, then (PAFA,PAFB) may not change state until the next
t
SKEW2
FULL M WORDS
N + 1 WORDS
IN FIFO
IN FIFO
t
t
[24]
ENS
ENS
CY7C4831/4841/4851
CY7C4801/4811/4821
t
t
ENH
[23]
ENH
Note
20
t
PAF
Page 12 of 23
t
PAE
48X1–12
48X1–13
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