emc646sp16ak Emlsi Inc., emc646sp16ak Datasheet - Page 40

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

Figure 29: 4-Word Burst READ Operation - Variable Latency
Note:
1. Non-default BCR settings: Latency code two (three clocks); WAIT active LOW; WAIT asserted during delay.
LB#/UB#
DQ[15:0]
A[21:0]
ADV#
WAIT
WE#
CLK
OE#
CE#
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
OH
OL
OH
OL
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
IH
IL
High-Z
High-Z
Valid Address
READ Burst Identified
t
t
t
CSP
SP
t
t
(WE# = HIGH)
SP
SP
SP
t
CEW
t
HD
t
t
HD
HD
t
ABA
t
OLZ
t
KHKL
t
BOE
40
t
t
ACLK
KHTL
t
CLK
Output
t
Valid
CEM
t
KOH
Output
Valid
t
KP
Output
Valid
Don’t Care
EMC646SP16AK
4Mx16 CellularRAM
Output
t
Valid
KP
t
t
HD
HD
t
OHZ
t
HZ
t
Undefined
CBPH
High-Z
High-Z