FULLFLEX datasheet(37/52 Pages) CYPRESS

部件名	FULLFLEX

功能描述	FullFlex Synchronous SDR Dual Port SRAM Commercial and Industrial temperature

PDF	52 Pages

Scroll/Zoom	100%

制造商	CYPRESS [Cypress Semiconductor]

网页	http://www.cypress.com

标志

37 / 52 page

FullFlex

Document Number: 38-06082 Rev. *K

Page 37 of 52

Figure 26. READ-to-WRITE for Pipelined Mode (OE = VIL)[59, 60, 61]

Figure 27. READ-to-WRITE for Pipelined Mode (OE Controlled)[62, 63]

Switching Waveforms (continued)

An+1

An+2

tCYC

DQx-2

DQx-1

DQx

DQn

DQn+1

DQn+2

tCH

tCL

tSAC tHAC

tDC

tCD2

tCKHZ2

tSD tHD

R/W

tCKLZ2

R/W

Ax+1

Ax+2

An+1

An+2

An+3

tCYC

DQx-2

DQx-1

DQx

DQn

DQn+1

DQn+2

DQn+3

tSAC tHAC

tOHZ

tSD

tHD

Notes

59. When OE = VIL, the last read operation is enabled to complete before the DQ bus is tri-stated and the user is enabled to drive write data.

60. Two dummy writes are issued to accomplish bus turnaround. The third instruction is the first valid write.

61. Chip enable or all byte enables are held inactive during the two dummy writes to avoid data corruption.

62. OE is deasserted and tOHZ enabled to elapse before the first write operation is issued.

63. Any write scheduled to complete after OE is deasserted is pre-empted.

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