CY14B101K

Pin Configurations

VCAP

A16

A14

A12

A7

A6

A5

INT

A4

NC

NC

NC

VSS

NC

VRTCbat

DQ0

A3

A2

A1

A0

DQ1

DQ2 x1 x2

Figure 1. 48-Pin SSOP

1

2

3

4

5

6

7

8

9

1048-SSOP

11

12Top View

13

14(Not To Scale)

15

16

17

18

19

20

21

22

23

24

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

VCC A15

HSB

WE

A13

A8

A9

NC

A11

NC

NC

NC

VSS

NC

VRTCcap

DQ6

OE

A10

CE

DQ7

DQ5

DQ4

DQ3

VCC

Table 1. Pin Definitions

Pin Name

Alt

IO Type

Description

 

A0 – A16

 

 

 

 

 

 

 

Input

Address Inputs. Used to select one of the 131,072 bytes of the nvSRAM.

 

DQ0 – DQ7

 

 

 

 

 

 

 

Input Output

Bidirectional Data IO Lines. Used as input or output lines depending on operation

 

 

 

NC

 

 

 

 

 

 

 

No Connect

No Connects. This pin is not connected to the die

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input

Write Enable Input, Active LOW. When the chip is enabled and

 

is LOW, data on the IO pins

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WE

 

 

WE

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is written to the specific address location.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input

Chip Enable Input, Active LOW. When LOW, selects the chip. When HIGH, deselects the chip.

 

 

 

CE

 

E

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input

Output Enable, Active LOW. The active low

 

input enables the data output buffers during

 

 

 

 

 

 

 

 

 

 

 

 

 

OE

 

 

OE

 

G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

READ cycles. Deasserting OE high causes the IO pins to tri-state.

 

 

 

 

X1

 

 

 

 

 

 

 

Output

Crystal Connection Drives crystal on start up.

 

 

 

 

X2

 

 

 

 

 

 

 

Input

Crystal Connection for 32.768 kHz crystal.

 

VRTCcap

 

 

 

 

 

 

 

Power Supply

Capacitor Supplied Backup RTC Supply Voltage. (Left unconnected if VRTCbat is used)

VRTCbat

 

 

 

 

 

 

 

Power Supply

Battery Supplied Backup RTC Supply Voltage. (Left unconnected if VRTCcap is used)

 

 

INT

 

 

 

 

 

 

 

Output

Interrupt Output. Program to respond to the clock alarm, the watchdog timer, and the power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

monitor. Programmable to either active HIGH (push or pull) or LOW (open drain).

 

 

VSS

 

 

 

 

 

 

 

Ground

Ground for the Device. Must be connected to ground of the system.

 

 

VCC

 

 

 

 

 

 

 

Power Supply

Power Supply Inputs to the Device.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Input Output

Hardware Store Busy. When LOW this output indicates a Hardware Store is in progress. When

 

HSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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).

 

VCAP

 

 

 

 

 

 

 

Power Supply

AutoStore™ Capacitor. Supplies power to nvSRAM during power loss to store data from SRAM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to nonvolatile elements.

 

Document Number: 001-06401 Rev. *I

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Cypress CY14B101K Pin Configurations, Pin Definitions, Pin Name Alt IO Type Description, Power Supply Inputs to the Device