CY7C0852V-150BBC Cypress Semiconductor Corp, CY7C0852V-150BBC Datasheet - Page 22

• Manufacturer Part Number: CY7C0852V-150BBC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C0852V-150BBC

• Density: 4Mb
• Access Time (max): 4ns
• Operating Supply Voltage (typ): 3.3V
• Package Type: BGA
• Operating Temp Range: 0C to 70C
• Supply Current: 450mA
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 172
• Word Size: 36b
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-06059 Rev. *D
Switching Waveforms
Bank Select Read
Notes:
27. In this depth-expansion example, B1 represents Bank #1 and B2 is Bank #2; each bank consists of one Cypress CY7C085XV device from this data sheet.
28.
29. Output state (HIGH, LOW, or high-impedance) is determined by the previous cycle control signals.
30. During “No Operation,” data in memory at the selected address may be corrupted and should be rewritten to ensure data integrity.
31.
32. CE
ADDRESS
ADDRESS
Read-to-Write-to-Read (OE = LOW)
DATA
DATA
ADDRESS
DATA
ADDRESS
completed (labelled as no operation). One clock cycle is required to three-state the I/O for the Write operation on the next rising edge of CLK.
DATA
ADS = CNTEN= B0 – B3 = OE = LOW; MRST = CNTRST = CNT/MSK = HIGH.
CE
OUT(B2)
0
OUT(B1)
0
CE
CE
CLK
R/W
= B0 – B3 = R/W = LOW; CE
OUT
= OE = B0 – B3 = LOW; CE
CE
CLK
(B1)
(B1)
(B2)
IN
(B2)
(B1)
t
t
t
SW
SC
SA
= ADDRESS
t
t
t
t
SA
SC
SA
SC
[27, 28]
A
n
A
A
0
t
0
(B2)
CH2
t
CH2
.
t
(continued)
CYC2
t
1
t
t
1
HW
HC
HA
= R/W = CNTRST = MRST = HIGH.
t
= CNTRST = MRST = CNT/MSK = HIGH. When R/W first switches low, since OE = LOW, the Write operation cannot be
t
t
t
t
CYC2
HC
HC
HA
HA
t
CL2
t
CL2
[26, 29, 30, 31, 32]
A
READ
n+1
A
A
t
CD2
1
1
t
CD2
t
SW
PRELIMINARY
t
Q
SC
n
Q
t
A
0
SC
n+2
t
A
CKHZ
NO OPERATION
A
2
2
t
t
DC
HC
t
HW
CY7C0851V/CY7C0852V/CY7C0853V
t
HC
t
CD2
t
SD
A
D
n+2
n+2
Q
t
A
HD
A
1
3
t
3
DC
t
t
CKLZ
CKHZ
WRITE
t
CD2
CY7C0831V/CY7C0832V
A
n+3
Q
A
A
4
2
4
t
t
t
CKHZ
CD2
CKLZ
READ
t
CKLZ
Q
3
A
n+4
Page 22 of 33
A
t
A
CD2
5
t
5
t
CKLZ
t
CKHZ
CD2
Q
n+3
Q
4