4-Mbit nvSRAM Specification Sheet
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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