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AS7C3364PFS32B-166TQCN Datasheet(PDF) 5 Page - Alliance Semiconductor Corporation

Part # AS7C3364PFS32B-166TQCN
Description  3.3V 64K X 32/36 pipeline burst synchronous SRAM
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Manufacturer  ALSC [Alliance Semiconductor Corporation]
Direct Link  https://www.alliancememory.com
Logo ALSC - Alliance Semiconductor Corporation

AS7C3364PFS32B-166TQCN Datasheet(HTML) 5 Page - Alliance Semiconductor Corporation

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AS7C3364PFS32B
AS7C3364PFS36B
®
12/10/04; v.1.4
Alliance Semiconductor
P. 5 of 19
Snooze Mode
SNOOZE MODE is a low current, power-down mode in which the device is deselected and current is reduced to ISB2. The duration of
SNOOZE MODE is dictated by the length of time the ZZ is in a High state.
The ZZ pin is an asynchronous, active high input that causes the device to enter SNOOZE MODE.
When the ZZ pin becomes a logic High, ISB2 is guaranteed after the time tZZI is met. After entering SNOOZE MODE, all inputs except ZZ is
disabled and all outputs go to High-Z. Any operation pending when entering SNOOZE MODE is not guaranteed to successfully complete.
Therefore, SNOOZE MODE (READ or WRITE) must not be initiated until valid pending operations are completed. Similarly, when exiting
SNOOZE MODE during tPUS, only a DESELECT or READ cycle should be given while the SRAM is transitioning out of SNOOZE
MODE.
Signal descriptions
Signal
I/O
Properties
Description
CLK
I
CLOCK
Clock. All inputs except OE, ZZ, LBO are synchronous to this clock.
A,A0,A1
I
SYNC
Address. Sampled when all chip enables are active and ADSC or ADSP are asserted.
DQ[a,b,c,d]
I/O
SYNC
Data. Driven as output when the chip is enabled and OE is active.
CE0
I
SYNC
Master chip enable. Sampled on clock edges when ADSP or ADSC is active. When CE0
is inactive, ADSP is blocked. Refer to the Synchronous Truth Table for more information.
CE1, CE2
I
SYNC
Synchronous chip enables. Active HIGH and active Low, respectively. Sampled on clock
edges when ADSC is active or when CE0 and ADSP are active.
ADSP
I
SYNC
Address strobe processor. Asserted LOW to load a new bus address or to enter standby
mode.
ADSC
I
SYNC
Address strobe controller. Asserted LOW to load a new address or to enter standby mode.
ADV
I
SYNC
Advance. Asserted LOW to continue burst read/write.
GWE
I
SYNC
Global write enable. Asserted LOW to write all 32/36 bits. When High, BWE and
BW[a:d] control write enable.
BWE
I
SYNC
Byte write enable. Asserted LOW with GWE = HIGH to enable effect of BW[a:d] inputs.
BW[a,b,c,d]
I
SYNC
Write enables. Used to control write of individual bytes when GWE = HIGH and BWE =
Low. If any of BW[a:d] is active with GWE = HIGH and BWE = LOW the cycle is a
write cycle. If all BW[a:d] are inactive the cycle is a read cycle.
OE
I
ASYNC
Asynchronous output enable. I/O pins are driven when OE is active and the chip is in read
mode.
LBO
ISTATIC
Selects Burst mode. When tied to VDD or left floating, device follows Interleaved Burst
order. When driven Low, device follows linear Burst order. This signal is internally
pulled High.
ZZ
I
ASYNC
Snooze. Places device in low power mode; data is retained. Connect to GND if unused.
NC
-
-
No connect


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