CY7C024/0241
CY7C025/0251
Document #: 38-06035 Rev. *B
Page 17 of 20
Table 3. Semaphore Operation Example
Function
I/O0–I/O15/17
Left
I/O0–I/O15/17
Right
Status
No action
1
1
Semaphore free
Left port writes 0 to semaphore
0
1
Left Port has semaphore token
Right port writes 0 to semaphore
0
1
No change. Right side has no write access to semaphore.
Left port writes 1 to semaphore
1
0
Right port obtains semaphore token
Left port writes 0 to semaphore
1
0
No change. Left port has no write access to semaphore
Right port writes 1 to semaphore
0
1
Left port obtains semaphore token
Left port writes 1 to semaphore
1
1
Semaphore free
Right port writes 0 to semaphore
1
0
Right port has semaphore token
Right port writes 1 to semaphore
1
1
Semaphore free
Left port writes 0 to semaphore
0
1
Left port has semaphore token
Left port writes 1 to semaphore
1
1
Semaphore free
Ordering Information
4K x16 Dual-Port SRAM
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
15
CY7C024–15AC
A100
100-Pin Thin Quad Flat Pack
Commercial
CY7C024–15JC
J83
84-Lead Plastic Leaded Chip Carrier
25
CY7C024–25AC
A100
100-Pin Thin Quad Flat Pack
Commercial
CY7C024–25JC
J83
84-Lead Plastic Leaded Chip Carrier
CY7C024–25AI
A100
100-Pin Thin Quad Flat Pack
Industrial
CY7C024–25JI
J83
84-Lead Plastic Leaded Chip Carrier
35
CY7C024–35AC
A100
100-Pin Thin Quad Flat Pack
Commercial
CY7C024–35JC
J83
84-Lead Plastic Leaded Chip Carrier
CY7C024–35AI
A100
100-Pin Thin Quad Flat Pack
Industrial
CY7C024–35JI
J83
84-Lead Plastic Leaded Chip Carrier
55
CY7C024–55AC
A100
100-Pin Thin Quad Flat Pack
Commercial
CY7C024–55JC
J83
84-Lead Plastic Leaded Chip Carrier
CY7C024–55AI
A100
100-Pin Thin Quad Flat Pack
Industrial
CY7C024–55JI
J83
84-Lead Plastic Leaded Chip Carrier
Notes:
41. A0L–12L and A0R–12R, 1FFF/1FFE for the CY7C025.
42. If BUSYR=L, then no change.
43. If BUSYL=L, then no change.
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