lf3312 LOGIC Devices Incorporated, lf3312 Datasheet - Page 27

• Manufacturer Part Number: lf3312
• Description: 12-mbit Frame Buffer / Fifo
• Manufacturer: LOGIC Devices Incorporated

D[11:0]
Write Cycle Timing - Write Enable
Read Cycle Timing
Write Cycle Timing - Write Masking
WCLK
D[11:0]
Q[11:0]
WIEN
WCLK
COLLIDE
RCLK
WEN
DEVICES INCORPORATED
LOGIC Devices Incorporated
REN
PE
OE = LOW
NOTE: REN should be brought LOW 2 rising edges of RCLK prior to expecting valid data on Q
WEN = LOW
NOTE: Bringing WIEN HIGH disables data on D from being written into memory, yet it does not disable the Write pointer from incrementing
NOTE: WIEN must be brought HIGH 2 rising edges of WCLK prior to masking input data on D
IEN = LOW
NOTE: WEN must be brought LOW 2 rising edges of WCLK prior to latching valid data on D
(n–2)
t
PWH
t
PWH
t
PWH
t
D
t
t
CYC1
CYC2
t
t
CYC1
CYC2
t
t
CYC1
CYC2
t
PWL
t
PWL
t
PWL
t
DS
t
(n–1)
DS
(n)
(n)
t
DH
t
DH
(n+1)
(n+1)
(n)
t
F
t
t
RES
WES
t
WES
(n+3)
(n+1)
(n+3)
t
F
27
(n+4)
(n+4)
t
t
REH
WEH
t
WEH
data not
written
(n+5)
(n+2)
12-Mbit Frame Buffer / FIFO
data not
written
(n+6)
Preliminary Datasheet
Video Imaging Product
t
D
August 8, 2006 LDS.3312 O
(n+7)
(n+3)
(n+5)
LF3312