Cypress STK14D88 manual Pin Configurations, Pin Descriptions

STK14D88

Pin Configurations

Figure 1. Pin Diagram 48-Pin SSOP/32-SOIC

48-Pin SSOP

VCAP	1			48		VCC
NC	2			47	NC
A14	3			46
						HSB
A12
	4			45		W
A7	5			44		A13
A6	6			43			A8
A5	7			42			A9
NC	8			41		NC
A4	9			40		A11
NC	10			39		NC
NC	11			38		NC
NC	12		TOP	37		NC
VSS	13			36		VSS
NC	14			35		NC
NC	15			34		NC
DQ0	16			33		DQ6
A3	17			32			G
A2	18			31		A10
A1	19			30
							E
A0	20			29		DQ7
DQ1	21			28		DQ5
DQ2	22			27		DQ4
NC		23		26		DQ3
NC		24		25		VCC

32-SOIC

VCAP	1		32			VCC
A14	2		31
						HSB
A12	3		30			W
A7	4		29			A13
A6	5		28			A8
A5	6		27				A9
A4	7		26			A11
A3	8		25
		TOP						G
NC	9		24			NC
A2	10		23			A10
A1	11		22
							E
A0	12		21		DQ7
DQ0	13		20		DQ6
DQ1	14		19		DQ5
DQ2	15		18		DQ4
VSS	16		17		DQ
				3

Relative PCB Area Usage[1]

SSOP

Pin Descriptions

Pin Name		I/O			Description
A14-A0		Input	Address: The 15 address inputs select one of 32,768 bytes in the nvSRAM array
DQ7-DQ0		I/O	Data: Bi-directional 8-bit data bus for accessing the nvSRAM
		Input	Chip Enable: The active low		input selects the device
	E			E

WInput Write Enable: The active low W enables data on the DQ pins to be written to the address location latched by the falling edge of E

GInput Output Enable: The active low G input enables the data output buffers during read cycles. De-asserting G high caused the DQ pins to tri-state.

	VCC	Power Supply	Power: 3.0V, +20%, -10%
		I/O		: When low this output indicates a Store is in progress. When pulled low
	HSB		Hardware Store Busy
			external to the chip, it will initiate a nonvolatile STORE operation. A weak 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 storage elements.
	VSS	Power Supply	Ground
	NC	No Connect	Unlabeled pins have no internal connections.

Note

1. See “Package Diagrams” on page 15 for detailed package size specifications.

Document Number: 001-52037 Rev. ** Page 2 of 17

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