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CY7C225A
Document #: 38-04001 Rev. *B
Page 5 of 9
Programming Information
Programming support is available from Cypress as well as
from a number of third-party software vendors. For detailed
programming information, including a listing of software
packages, please see the PROM Programming Information
located at the end of this section. Programming algorithms can
be obtained from any Cypress representative.
Table 1. Mode Selection
Pin Function[8]
Read or Output Disable
A8–A0
CP
ES
CLR
E
PS
O7−O0
Mode
Other
A8–A0
PGM
VFY
VPP
E
PS
D7−D0
Read
A8–A0
X
VIL
VIH
VIL
VIH
O7−O0
Output Disable
A8–A0
X
VIH
VIH
X
VIH
High Z
Output Disable
A8–A0
X
X
VIH
VIH
VIH
High Z
Clear
A8–A0
X
VIL
VIL
VIL
VIH
Zeros
Preset
A8–A0
X
VIL
VIH
VIL
VIL
Ones
Program
A8–A0
VILP
VIHP
VPP
VIHP
VIHP
D7−D0
Program Verify
A8–A0
VIHP
VILP
VPP
VIHP
VIHP
O7−O0
Program Inhibit
A–A0
VIHP
VIHP
VPP
VIHP
VIHP
High Z
Intelligent Program
A8–A0
VILP
VIHP
VPP
VIHP
VIHP
D7−D0
Blank Check
A8–A0
VIHP
VILP
VPP
VIHP
VIHP
Zeros
Note:
8.
X = “don’t care” but not to exceed VCC ±5%.
Figure 1. Programming Pinouts
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
24
23
22
21
13
14
A8
A7
A6
A5
A4
A3
A2
A1
A0
D0
D1
D2
GND
VCC
D7
D6
D4
D5
D3
15
PS
E
VPP
VFY
PGM
28
4
5
6
7
8
9
10
32 1
27
1314151617
26
25
24
23
22
21
20
11
12
19
D0
18
NC
A0
A4
A3
D7
D6
A2
A1
E
VPP
VFY
PGM
NC
DIP
LCC/PLCC
Top View
Top View