Cypress CY14B101NA, CY14B101LA Pin Definitions Pin Name Type Description, Hardware Store Busy

					PRELIMINARY	CY14B101LA, CY14B101NA
Pinouts (continued)
			Figure 3. Pin Diagram - 48-Pin SSOP and 32-Pin SOIC
VCAP
	1			48	VCC
A16
	2			47	A15
A14	3			46	HSB
A12
	4			45	WE
A7
	5			44	A13
A6
	6			43	A8
A5
	7			42	A9
INT	8			41	NC
A4	9	48-SSOP		40	A11
NC	10			39	NC
NC	11	Top View		38	NC
NC	12			37	NC
VSS	13	(not to scale)		36	V
NC	14				SS
				35	NC
NC
	15			34	NC
DQ0	16			33	DQ6
A3	17
				32	OE
A2	18			31	A10
A1	19
				30	CE
A0	20			29	DQ7
DQ1	21			28	DQ5
DQ2
	22			27	DQ4
NC	23			26	DQ3
NC	24			25	VCC

Table 1.

Pin Definitions

Pin Name

I/O Type

Description

A0 – A16

Input

Address Inputs Used to Select one of the 131,072 bytes of the nvSRAM for x8 Configuration.

A0 – A15

Address Inputs Used to Select one of the 65,536 words of the nvSRAM for x16 Configuration.

DQ0 – DQ7

Input/Output

Bidirectional Data I/O Lines for x8 Configuration. Used as input or output lines depending on operation.

DQ – DQ

Bidirectional Data I/O Lines for x16 Configuration. Used as input or output lines depending on

0

15

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.

Input

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

CE

Input

Output Enable, Active LOW. The active LOW

OE

input enables the data output buffers during read

OE

cycles. I/O pins are tri-stated on deasserting OE HIGH.

Input

Byte High Enable, Active LOW. Controls DQ15 - DQ8.

BHE

Input

Byte Low Enable, Active LOW. Controls DQ7 - DQ0.

BLE

VSS

Ground

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

VCC

Power

Power Supply Inputs to the Device. 3.0V +20%, –10%

Supply

[8]

Input/Output

Hardware STORE Busy

(HSB)

. When LOW this output indicates that a Hardware STORE is in progress.

HSB

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.

VCAP

Power

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

Supply

nonvolatile elements.

NC

No Connect

No Connect. This pin is not connected to the die.

Document #: 001-42879 Rev. *B

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