Cypress CY14B104K, CY14B104M manual Features, Functional Description

PRELIMINARY CY14B104K, CY14B104M

4 Mbit (512K x 8/256K x 16) nvSRAM with Real Time Clock

Features

■20 ns, 25 ns, and 45 ns access times

■Internally organized as 512K x 8 (CY14B104K) or 256K x 16 (CY14B104M)

■Hands off automatic STORE on power down with only a small capacitor

■STORE to QuantumTrap® nonvolatile elements is initiated by software, device pin, or AutoStore® on power down

■RECALL to SRAM initiated by software or power up

■High reliability

■Infinite Read, Write, and RECALL cycles

■200,000 STORE cycles to QuantumTrap

■20 year data retention

■Single 3V +20%, –10% operation

■Data integrity of Cypress nvSRAM combined with full featured Real Time Clock

■Watchdog timer

■Clock alarm with programmable interrupts

■Capacitor or battery backup for RTC

■Commercial and industrial temperatures

■44 and 54-pin TSOP II package

■Pb-free and RoHS compliance

Functional Description

The Cypress CY14B104K/CY14B104M combines a 4-Mbit nonvolatile static RAM with a full featured Real Time Clock in a monolithic integrated circuit. The embedded nonvolatile elements incorporate QuantumTrap technology producing the world’s most reliable nonvolatile memory. The SRAM is read and written infinite number of times, while independent nonvolatile data resides in the nonvolatile elements.

The Real Time Clock function provides an accurate clock with leap year tracking and a programmable, high accuracy oscillator. The alarm function is programmable for periodic minutes, hours, days or months alarms. There is also a programmable watchdog timer for process control.

Logic Block Diagram	[1, 2, 3]	Trap		CCP
		Quatrum	V		VCA
		2048 X 2048

A0	R		POWER	VRTCbat
A1		STORE	CONTROL	VRTCcap
	O
A2	W	RECALL
A3
			STORE/RECALL
A4	D			HSB
A5	E	STATIC RAM	CONTROL
A6	C	ARRAY
A7	O	2048 X 2048	SOFTWARE
	D
A8				A14 - A2
	E		DETECT
A17
	R
A18

DQ0
DQ1
DQ2			X1
DQ3
		RTC	X2
DQ4	I
			INT
DQ5	N
	P
DQ6	U
DQ7	T
	B	COLUMN I/O
DQ8	U	MUX	A18- A0
	F
DQ9	F
DQ10	E	COLUMN DEC	OE
	R		WE
DQ11	S
DQ12
DQ13			CE
DQ14	A9	A10 A11 A12 A13 A14 A15 A16	BLE
DQ15
			BHE

Notes

1.Address A0 - A18 for x8 configuration and Address A0 - A17 for x16 configuration.

2.Data DQ0 - DQ7 for x8 configuration and Data DQ0 - DQ15 for x16 configuration.

3.BHE and BLE are applicable for x16 configuration only.

Cypress Semiconductor Corporation • 198 Champion Court	•	San Jose, CA 95134-1709	•	408-943-2600
Document #: 001-07103 Rev. *K		Revised January 29, 2009

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