CY7C225A
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.
Programming Information
Programming support is available from Cypress as well as
from a number of third-party software vendors. For detailed
Table 1. Mode Selection
Pin Function[8]
Read or Output Disable
Other
A8–A0
A8–A0
A8–A0
A8–A0
A8–A0
A8–A0
A8–A0
A8–A0
A8–A0
A–A0
CP
PGM
X
ES
VFY
VIL
CLR
VPP
VIH
E
PS
PS
O7−O0
D7−D0
O7−O0
High Z
High Z
Zeros
Mode
Read
E
VIL
VIH
Output Disable
Output Disable
Clear
X
VIH
X
VIH
X
VIH
X
VIH
VIH
VIL
VIH
X
VIL
VIL
VIH
Preset
X
VIL
VIH
VIL
VIL
Ones
Program
VILP
VIHP
VIHP
VILP
VIHP
VIHP
VILP
VIHP
VIHP
VILP
VPP
VPP
VPP
VPP
VPP
VIHP
VIHP
VIHP
VIHP
VIHP
VIHP
VIHP
VIHP
VIHP
VIHP
D7−D0
O7−O0
High Z
D7−D0
Zeros
Program Verify
Program Inhibit
Intelligent Program
Blank Check
A8–A0
A8–A0
Note:
8. X = “don’t care” but not to exceed VCC ±5%.
DIP
Top View
LCC/PLCC
Top View
A
24
23
V
1
7
CC
A
6
A
8
2
3
4
5
6
3
2 1 28 27
4
26
25
24
A
5
22
21
PS
E
E
V
A
5
6
7
8
9
4
A
PP
A
4
3
A
2
23 VFY
A
3
20
19
18
17
16
V
PP
PGM
NC
D
D
6
A
22
1
A
2
VFY
A
21
20
19
0
NC
D
A
1
PGM
10
11
7
7
0
A
0
D
7
D
6
8
1314151617 18
12
D
D
0
9
D
5
1
15
14
13
10
11
12
D
D
4
2
D
3
GND
Figure 1. Programming Pinouts
Document #: 38-04001 Rev. *B
Page 5 of 9
CYPRESS [ CYPRESS ]
