emc643sp16ak Emlsi Inc., emc643sp16ak Datasheet - Page 38

• Manufacturer Part Number: emc643sp16ak
• Description: 4mx16 Bit Cellularram Ad-mux
• Manufacturer: Emlsi Inc.

Figure 25: 4-Word Burst READ Operation - Variable Latency
Notes :
1. Non-default BCR settings: Latency code two (three clocks); WAIT active LOW; WAIT asserted during delay.
2. WAIT Will remain de-asserted even if CE# remains LOW past the end of the defined burst length.
3. A/DQ[15:0] will output undefined data if CE# remains LOW past the end of the defined burst length.
A/DQ[15:0]
LB#/UB#
A[21:16]
WAIT
ADV#
WE#
CLK
CE#
OE#
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
IH
IL
OH
OL
High-Z
READ Burst Identified
Valid Address
(WE# = HIGH)
t
t
t
CSP
SP
SP
address
t
SP
t
Valid
t
SP
SP
t
KHTL
t
HD
t
HD
t
t
HD
HD
t
ABA
t
V
V
OLZ
OH
OL
t
KHKL
t
t
BOE
ACLK
38
t
KHTL
t
KOH
t
CLK
Output
t
Valid
CEM
t
KOH
Output
Valid
t
KP
4Mx16 CellularRAM AD-MUX
Output
Valid
Don’t Care
EMC643SP16AK
t
KP
Output
Valid
t
HD
t
HD
t
OHZ
Undefined
t
HZ
t
CBPH
Note 2
Note 3
High-Z
High-Z