emc646sp16ak Emlsi Inc., emc646sp16ak Datasheet - Page 50

• Manufacturer Part Number: emc646sp16ak
• Description: 4mx16 Bit Cellularram
• Manufacturer: Emlsi Inc.

Figure 39. Burst WRITE Operation - Variable Latency Mode
Note:
1. Non-default BCR settings for burst WRITE operation in variable latency mode: Latency code two (three clocks); WAIT active LOW; WAIT
2. WAIT asserts for LC cycles for both fixed and variable latency. LC = Latency Code (BCR[13:11]).
3. t
asserted during delay; burst length four; burst wrap enabled.
AS
required if t
LB#/UB#
DQ[15:0]
A[21:0]
ADV#
WAIT
WE#
CLK
OE#
CE#
CSP
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
OH
OL
iH
iL
> 20ns.
High-Z
t
t
AS
AS
3
3
WRITE Burst Identified
t
t
t
SP
Valid Address
CSP
t
SP
t
CEW
SP
(WE# = Low)
t
t
HD
HD
t
HD
Note 2
50
t
KHTL
t
SP
t
CLK
t
CEM
t
SP
D1
t
HD
t
HD
t
KHKL
D2
D3
EMC646SP16AK
t
KP
4Mx16 CellularRAM
t
KP
D0
t
HD
t
HZ
t
Don’t Care
CBPH
High-Z