CY7C008V-20AC Cypress Semiconductor Corp, CY7C008V-20AC Datasheet - Page 15
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CY7C008V-20AC
Manufacturer Part Number
CY7C008V-20AC
Description
Manufacturer
Cypress Semiconductor Corp
Datasheets
1.CY7C008V-20AC.pdf
(18 pages)
2.CY7C008V-20AC.pdf
(18 pages)
3.CY7C008V-20AC.pdf
(18 pages)
4.CY7C008V-20AC.pdf
(18 pages)
Specifications of CY7C008V-20AC
Density
512Kb
Access Time (max)
20ns
Operating Supply Voltage (typ)
5V
Package Type
TQFP
Operating Temp Range
0C to 70C
Supply Current
265mA
Operating Supply Voltage (min)
4.5V
Operating Supply Voltage (max)
5.5V
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
100
Word Size
8b
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
X
Function
L
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
X
H
H
L
L
L
CE
I/O
X
X
L
L
High Z
Data Out
High Z
Data In
Data Out
Data In
L
0
–I/O
I/O
Outputs
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
Deselected: Power-Down
Read Data in Semaphore Flag
I/O Lines Disabled
Write into Semaphore Flag
Read
Write
Not Allowed
0L–16L
–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
Operation
CE
X
X
L
L
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]
X
X
[41]
R