CY7C019V-20AI Cypress Semiconductor Corp, CY7C019V-20AI Datasheet - Page 15

• Manufacturer Part Number: CY7C019V-20AI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C019V-20AI

• 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: 17b
• Package Type: TQFP
• Operating Temp Range: -40C to 85C
• Number Of Ports: 2
• Supply Current: 195mA
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (max): 3.6V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Word Size: 9b
• Number Of Words: 128K
• Lead Free Status / RoHS Status: Not Compliant

Document #: 38-06044 Rev. *C
register to prevent the semaphore from changing state during
a write from the other port. If both ports attempt to access the
semaphore within t
Table 1. Non-Contending Read/Write
Table 2. Interrupt Operation Example (assumes BUSY
Table 3. Semaphore Operation Example
Notes:
40. A
41. If BUSY
42. If BUSY
Set Right INT
Reset Right INT
Set Left INT
Reset Left INT
No action
Left port writes 0 to 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
H
X
L
L
L
0L–16L
Function
R
L
and A
= L, then no change.
R/W
= L, then no change.
H
H
X
X
L
X
Function
L
0R–16R
R
Flag
Inputs
L
Flag
R
Flag
Flag
, 1FFFF/1FFFE for the CY7C009V/19V.
OE
SPS
H
X
X
X
X
L
L
of each other, the semaphore will
R/W
X
X
X
L
SEM
L
H
H
H
X
L
L
L
CE
X
X
I/O
L
L
High Z
Data Out
High Z
Data In
Data Out
Data In
L
0
–I/O
Outputs
I/O
1
0
0
1
1
0
1
1
1
0
1
OE
X
X
X
L
8
0
–I/O
Left Port
L
Left I/O
8
FFFE (or 1FFFE)
FFFF (or 1FFFF)
A
0
0L–16L
Deselected: Power-Down
Read Data in Semaphore Flag
I/O Lines Disabled
Write into Semaphore Flag
Read
Write
Not Allowed
–I/O
X
X
L
1
1
1
0
0
1
1
0
1
1
1
= BUSY
8
Right
definitely be obtained by one side or the other, but there is no
guarantee which side will control the semaphore.
R
Semaphore free
Left Port has semaphore token
No change. Right side has no write access to semaphore
Right port obtains semaphore token
No change. Left port has no write access to semaphore
Left port obtains semaphore token
Semaphore free
Right port has semaphore token
Semaphore free
Left port has semaphore token
Semaphore free
INT
H
L
= HIGH)
[41]
X
X
[42]
L
R/W
[40]
X
X
X
L
R
CE
Operation
X
L
L
X
R
OE
Status
X
X
X
L
Right Port
R
CY7C008V/009V
CY7C018V/019V
FFFE (or 1FFFE)
FFFF (or 1FFFF)
A
0R–16R
X
X
Page 15 of 18
INT
H
L
[42]
[41]
X
X
R
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