CY7C057V-20AC Cypress Semiconductor Corp, CY7C057V-20AC Datasheet - Page 12

• Manufacturer Part Number: CY7C057V-20AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C057V-20AC

• Density: 1.125Mb
• Access Time (max): 20ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 3.3V
• Address Bus: 15b
• Package Type: TQFP
• Operating Temp Range: 0C to 70C
• Number Of Ports: 2
• Supply Current: 340mA
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Word Size: 36b
• Number Of Words: 32K
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-06055 Rev. *B
Switching Waveforms
Timing Diagram of Semaphore Contention
Semaphore Read After Write Timing, Either Side
Notes:
37. CE
38. I/O
39. Semaphores are reset (available to both ports) at cycle start.
40. If t
A
A
A
SPS
0R
0
0
0R
0L
–A
SEM
= HIGH and CE
SEM
SEM
R/W
R/W
I/O
R/W
= I/O
–A
OE
–A
is violated, the semaphore will definitely be obtained by one side or the other, but which side will get the semaphore is unpredictable.
2
0
2L
2R
R
R
L
L
0L
= LOW (request semaphore); CE
1
= LOW for the duration of the above timing (both write and read cycle).
t
SA
(continued)
VALID ADRESS
t
AW
WRITE CYCLE
0R
t
t
PWE
SCE
= CE
t
SD
DATA
t
MATCH
SPS
MATCH
[38, 39, 40]
0L
= HIGH and CE
t
IN
HA
VALID
[37]
t
HD
t
1R
SWRD
= CE
1L
=LOW.
t
SOP
t
SOP
READ CYCLE
t
SAA
VALID ADRESS
t
DOE
t
ACE
DATA
OUT
VALID
CY7C056V
CY7C057V
t
OHA
Page 12 of 23
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