emc643sp16ak Emlsi Inc., emc643sp16ak Datasheet - Page 8

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

Table 2: BUS OPERATIONS
Note:
1. With burst mode enabled, CLK must be static(HIGH or LOW) during asynchronous READs and asynchronous WRITEs and to achieve standby power
2. The WAIT polarity is configured through the bus configuration register (BCR[10]).
3. When LB# and UB# are in select mode (LOW), DQ[15:0] are enabled. When only LB# is in select mode, DQ[7:0] are enabled. When only UB# is
4. The device will consume active power in this mode whenever addresses are changed.
5. When the device is in standby mode, address inputs and data inputs/outputs are internally isolated from any external influence.
6. VIN = VCCQ or 0V; all device pins must be static (unswitched) in order to achieve standby current.
7. When the BCR is configured for sync mode, sync READ and WRITE, and async READ and WRITE are supported by EMLSI
8. Burst mode operation is initialized through the bus configuration register (BCR[15]).
9. Initial cycle. Following cycles are the same as BURST CONTINUE. CE# must stay LOW for the equivalent of a single-word burst (as indicated
during standby mode.
in the select mode, DQ[15:8] are enabled.
by WAIT).
Asynchfonous Mode
Configuration register
Configuration register
Configuration register
Configuration register
Initial burst write
Initial burst read
Burst continue
No operation
No operation
Burst Mode
Async write
BCR[15]=1
BCR[15]=0
Async read
Standby
Standby
Read
Write
write
write
read
read
Standby
Standby
Power
Power
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Active
Idle
Idle
H or L
H or L
H or L
H or L
H or L
CLK ADV# CE#
CLK ADV# CE#
X
X
X
X
X
X
X
X
X
H
L
L
L
L
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
8
OE#
OE#
H
X
X
X
H
X
X
X
X
X
H
L
L
L
L
WE#
WE#
H
H
H
X
X
H
X
X
X
H
L
L
L
L
L
CRE
CRE
H
H
H
H
X
L
L
L
L
L
L
L
L
L
L
UB#/
UB#/
LB#
LB#
X
X
X
X
X
X
X
4Mx16 CellularRAM AD-MUX
L
L
L
L
L
L
L
L
WAIT2
High-z
High-z
High-z
High-z
Low-z
Low-z
Low-z
Low-z
Low-z
Low-z
Low-z
Low-z
Low-z
Low-z
Low-z
EMC643SP16AK
WAIT
A/DQ[15:0]
A/DQ[15:0]
Data out
Data out
Address
Address
Data out
Reg.out
Reg.out
Data in
Config.
Data in
Data in
Config.
High-z
High-z
High-z
High-z
or
X
X
Notes
Notes
5, 6
4, 6
4, 7
5, 6
4, 6
4, 8
4, 8
4, 8
8, 9
8, 9
4
4
4