CY7C144-35AC Cypress Semiconductor Corp, CY7C144-35AC Datasheet - Page 15

• Manufacturer Part Number: CY7C144-35AC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C144-35AC

• Density: 64Kb
• Access Time (max): 35ns
• Package Type: TQFP
• Operating Temp Range: 0C to 70C
• Supply Current: 160mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Word Size: 8b
• Lead Free Status / Rohs Status: Not Compliant

Document #: 38-06034 Rev. *C
Table 1. Non-Contending Read/Write
Table 2. Interrupt Operation Example (assumes BUSY
Table 3. Semaphore Operation Example
Set Left INT
Reset Left INT
Set Right INT
Reset Right INT
No action
Left port writes semaphore
Right port writes 0 to semaphore
Left port writes 1 to semaphore
Left port writes 0 to semaphore
Right port writes 1 to semaphore
Left port writes 1 to semaphore
Right port writes 0 to semaphore
Right port writes 1 to semaphore
Left port writes 0 to semaphore
Left port writes 1 to semaphore
CE
H
H
X
H
L
L
L
R/W
Function
H
H
X
X
L
X
Function
Inputs
OE
X
H
X
X
X
L
L
SEM
H
X
H
H
L
L
L
R/W
X
X
X
L
I/O
0-7/8
High Z
Data Out
High Z
Data In
Data Out
Data In
1
0
0
1
1
0
1
1
1
0
1
CE
X
X
L
L
L
Left
= BUSY
Left Port
Outputs
OE
I/O
X
X
X
I/O
L
R
0−7/8
= HIGH)
0-7/8
1
1
1
0
0
1
1
0
1
1
1
1FFE
A
1FFF
Right
0−12
X
X
INT
Semaphore free
Left port obtains semaphore
Right side is denied access
Right port is granted access to semaphore
No change. Left port is denied access
Left port obtains semaphore
No port accessing semaphore address
Right port obtains semaphore
No port accessing semaphore
Left port obtains semaphore
No port accessing semaphore
H
X
X
L
Power-Down
Read Data in Semaphore
I/O Lines Disabled
Write to Semaphore
Read
Write
Illegal Condition
R/W
X
X
X
L
CE
L
L
X
L
Operation
Status
Right Port
OE
X
X
L
L
CY7C144
CY7C145
A
1FFE
1FFF
Page 15 of 20
0−12
X
X
INT
X
X
H
L
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