CLB RAM Timing Characteristics
T
RC
ADDRESS
WRITE
WRITE ENABLE
T
AS
T
WP
T
AH
T
DS
DATA IN
REQUIRED
T
DH
READ
X,Y OUTPUTS
VALID
T
ILO
VALID
READ, CLOCKING DATA INTO FLIP-FLOP
TICK
CLOCK
T
CKO
XQ,YQ OUTPUTS
VALID
(OLD)
VALID
(NEW)
TCH
READ DURING WRITE
T
WP
WRITE ENABLE
T
DH
DATA IN
(stable during WE)
T
WO
X,Y OUTPUTS
VALID
VALID
DATA IN
(changing during WE)
OLD
T
WO
T
DO
VALID
(OLD)
NEW
X,Y OUTPUTS
VALID
(PREVIOUS)
VALID
(NEW)
READ DURING WRITE, CLOCKING DATA INTO FLIP-FLOP
T
WP
WRITE ENABLE
T
WCK
T
DCK
DATA IN
CLOCK
T
CKO
XQ,YQ OUTPUTS
X2640
2-79