Cypress Semiconductor CY7C037AV Şartname Sayfası - Sayfa 15

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Cypress Semiconductor CY7C037AV Şartname Sayfası
Table 1. Non-Contending Read/Write
Inputs
CE
R/W
OE
UB
H
X
X
X
X
X
L
L
X
L
L
X
L
L
X
L
H
L
L
H
L
L
H
L
X
X
H
H
H
L
X
H
L
H
X
X
X
L
X
X
L
X
X
Table 2. Interrupt Operation Example (assumes BUSY
Function
R/W
Set Right INT
Flag
L
R
Reset Right INT
Flag
X
R
Set Left INT
Flag
X
L
Reset Left INT
Flag
X
L
Table 3. Semaphore Operation Example
Function
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
Notes
37. A
and A
,FFFF/FFFE for the CY7C028V/038V.
0L–15L
0R–15R
38. If BUSY
=L, then no change.
R
39. If BUSY
=L, then no change.
L
Document #: 38-06078 Rev. *B
LB
SEM
X
X
H
High Z
H
H
H
High Z
L
H
H
Data In
H
L
H
High Z
L
L
H
Data In
L
H
H
Data Out
H
L
H
High Z
L
L
H
Data Out
X
X
X
High Z
X
X
L
Data Out
H
H
L
Data Out
X
X
L
Data In
H
H
L
Data In
L
X
L
X
L
L
L
Left Port
CE
OE
A
L
L
L
0L–14L
L
X
7FFF
X
X
X
X
X
X
L
L
7FFE
I/O
–I/O
Left I/O
–I/O
0
17
0
1
1
0
1
0
1
1
0
1
0
0
1
1
1
1
0
1
1
0
1
1
1
CY7C027V/027VN/027AV/028V
Outputs
I/O
–I/O
I/O
–I/O
9
17
0
8
High Z
High Z
High Z
Data In
Data In
High Z
Data Out
Data Out
High Z
Data Out
Data Out
Data In
Data In
[37]
=BUSY
=HIGH)
R
INT
R/W
CE
L
R
X
X
X
X
X
L
[38]
L
L
L
[39]
H
X
X
Right
17
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
CY7C037V/037AV/038V
Operation
Deselected: Power Down
Deselected: Power Down
Write to Upper Byte Only
Write to Lower Byte Only
Write to Both Bytes
Read Upper Byte Only
Read Lower Byte Only
Read Both Bytes
Outputs Disabled
Read Data in Semaphore Flag
Read Data in Semaphore Flag
Write D
into Semaphore Flag
IN0
Write D
into Semaphore Flag
IN0
Not Allowed
Not Allowed
Right Port
OE
A
R
R
0R–14R
X
X
L
7FFF
X
7FFE
X
X
Status
Page 15 of 18
INT
R
[39]
L
[38]
H
X
X
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