PRELIMINARY
CY14B101LA, CY14B101NA
Document #: 001-42879 Rev. *B
Page 3 of 25
Figure 3. Pin Diagram - 48-Pin SSOP and 32-Pin SOIC
Table 1. Pin Definitions
Pin Name
I/O Type
Description
A
0
– A
16
Input
Address Inputs Used to Select one of the 131,072 bytes of the nvSRAM for x8 Configuration.
A
0
– A
15
Address Inputs Used to Select one of the 65,536 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 the chip is enabled and WE is 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
. 3.0V +20%, –10%
HSB
[8]
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)
NC
A
8
NC
NC
V
SS
DQ6
DQ5
DQ4
V
CC
A
13
DQ3
A
12
DQ2
DQ1
DQ0
OE
A
9
CE
NC
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
11
A
7
A
14
A
15
A
16
NC
NC
NC
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
Top View
(not to scale)
A
10
NC
WE
DQ7
HSB
INT
V
SS
V
CC
V
CAP
NC
45
46
47
48
NC
NC
NC
NC
48-SSOP
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