CY7C0241E-15AXC Просмотр технического описания (PDF) - Cypress Semiconductor
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CY7C0241E-15AXC
Cypress Semiconductor
CY7C0241E-15AXC Datasheet PDF : 22 Pages
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CY7C024E, CY7C0241E
CY7C025E, CY7C0251E
Table 2. Interrupt Operation Example (Assumes BUSYL=BUSYR=HIGH)[11]
Function
Set right INTR flag
Reset right INTR flag
Set left INTL flag
Reset left INTL flag
Left Port
R/WL CEL
L
L
OEL
X
A0L–11L
(1)FFF
X
X
X
X
X
X
X
X
X
L
L (1)FFE
INTL
X
X
L[13]
H[12]
R/WR
X
X
L
X
Right Port
CER
X
OER
X
A0R–11R
X
L
L (1)FFF
L
X (1)FFE
X
X
X
INTR
L[12]
H[13]
X
X
Table 3. Semaphore Operation Example
Function
No action
Left port writes 0 to semaphore
Right port writes 0 to semaphore
I/O0–I/O15/17
Left
1
0
0
Left port writes 1 to semaphore
1
Left port writes 0 to semaphore
1
Right port writes 1 to semaphore
0
Left port writes 1 to semaphore
1
Right port writes 0 to semaphore
1
Right port writes 1 to semaphore
1
Left port writes 0 to semaphore
0
Left port writes 1 to semaphore
1
I/O0–I/O15/17
Right
1
1
1
0
0
1
1
0
1
1
1
Status
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
Notes
11. A0L–12L and A0R–12R, 1FFF/1FFE for the CY7C025E/CY7C0251E.
12. If BUSYL=L, then no change.
13. BUSYR=L, then no change.If
Document Number: 001-62932 Rev. *B
Page 8 of 22
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