PRELIMINARY
CY14B104LA, CY14B104NA
Document #: 001-49918 Rev. *A
Page 3 of 23
Figure 3. Pin Diagram - 54 Pin TSOP II (x16)
Pin Definitions
Pin Name
I/O Type
Description
A
0
– A
18
Input
Address Inputs Used to Select one of the 524,288 bytes of the nvSRAM for x8 Configuration
.
A
0
– A
17
Address Inputs Used to Select one of the 262,144 words of the nvSRAM for x16 Configuration
.
DQ
0
– DQ
7
Input/Output
Bidirectional Data I/O Lines for x8 Configuration
. Used as input or output lines depending on
operation.
DQ
0
– DQ
15
Bidirectional Data I/O Lines for x16 Configuration
. Used as input or output lines depending on
operation.
WE
Input
Write Enable Input, Active LOW
. When selected LOW, data on the I/O pins is written to the specific
address location.
CE
Input
Chip Enable Input, Active LOW
. When LOW, selects the chip. When HIGH, deselects the chip.
OE
Input
Output Enable, Active LOW
. The active LOW OE input enables the data output buffers during read
cycles. I/O pins are tri-stated on deasserting OE HIGH.
BHE
Input
Byte High Enable, Active LOW
. Controls DQ
15
- DQ
8
.
BLE
Input
Byte Low Enable, Active LOW
. Controls DQ
7
- DQ
0
.
V
SS
Ground
Ground for the Device
.
Must be connected to the ground of the system.
V
CC
Power Supply
Power Supply Inputs to the Device
.
HSB
[6]
Input/Output
Hardware Store Busy (HSB)
. When LOW this output indicates that a hardware store is in progress.
When pulled LOW external to the chip it initiates a nonvolatile STORE operation. A weak internal pull
up resistor keeps this pin HIGH if not connected (connection optional). After each store operation HSB
is driven HIGH for short time with standard output high current.
V
CAP
Power Supply
AutoStore Capacitor
. Supplies power to the nvSRAM during power loss to store data from SRAM to
nonvolatile elements.
NC
No Connect
No Connect
. This pin is not connected to the die.
Pinouts
(continued)
A
17
DQ
7
DQ
6
DQ
5
DQ
4
V
CC
DQ
3
DQ
2
DQ
1
DQ
0
NC
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
V
CAP
WE
A
8
A
10
A
11
A
12
A
13
A
14
A
15
A
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
54 - TSOP II
Top View
(
not to scale)
OE
CE
V
CC
NC
V
SS
NC
A
9
NC
NC
NC
NC
NC
NC
54
53
52
51
49
50
HSB
BHE
BLE
DQ
15
DQ
14
DQ
13
DQ
12
V
SS
DQ
11
DQ
10
DQ
9
DQ
8
(x16)
[4]
[5]
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