CY14B256LA-SP45XI Cypress Semiconductor Corp, CY14B256LA-SP45XI Datasheet
CY14B256LA-SP45XI
Specifications of CY14B256LA-SP45XI
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CY14B256LA-SP45XI Summary of contents
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... Application Note Abstract This application note provides information for converting from STK14C88-3 parts to the CY14B256LA. It lists the parameter differences between the parts and the design considerations when converting existing applications from STK14C88-3 to CY14B256LA. Introduction Cypress CY14B256LA is a 3V, 32Kb x 8, 256 Kbit nvSRAM in 0 ...
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... Parameters The CY14B256LA is a drop in replacement for STK14C88-3 and requires minimum changes in the application board. However, the differences in parameters should be considered before replacing one part with the other. differences in parameters between STK14C88-3 and CY14B256LA. Table 5. Parameter Comparison Parameter Description DC Parameters V Power Supply ...
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... SWITCH The difference in levels do not affect most applications except where the controller has operating range from 3.0V and above. In such applications, if CY14B256LA is used to replace STK14C88-3, at voltage levels below 3V, the controller could be tristated and hence CY14B256LA could write invalid data into the SRAM. This is because the CY14B256LA would be active ...
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... CY14B256LA. To disable AutoStore in STK14C88-3, the power is connected to the V pin and the V CAP CC left open). This cannot be done in CY14B256LA. For proper operation of the device, in CY14B256LA, power is connected to the V pin only. However, AutoStore disable CC is more easily done through simple software sequence. Therefore, if the STK14C88-3 is replaced in an application ...
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... STORE operation does not start when HSB is pulled low. However, the HSB pin is still internally pulled low for time in the STK14C88-3 device. DELAY CY14B256LA device does not pull the HSB pin low internally if write latch is not set. Document No. 001-55662 Rev. ** AN55662 duration. ...
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... Power Up Recall Related Improvements Additional parameters are specified in CY14B256LA such as HSB Output Disable Voltage (V Time (t ), and HSB High Active Time (t LZHSB of the additional specs in power up. Also, note that HSB remains low until the end of the power up in the new part. This would guard against the system inadvertently thinking the part has completed the boot up prior to real completion ...
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... Several parameters related to HSB and power up have improved/specified in the new device enabling faster device response, greater data security and ease of design. CY14B256LA is pin compatible and can replace the STK14C88-3 device with no changes or minimum changes to the firmware. The value of VCAP in the existing design needs to be considered while replacing the part. ...
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... Document History Document Title: Converting from STK14C88-3 to CY14B256LA Document Number: 001-55662 Revision ECN Orig. of Submission Change ** 2773126 PSR 10/01/09 All trademarks and registered trademarks referenced herein are the property of their respective owners. © Cypress Semiconductor Corporation, 2009. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product ...