STK14C88-N35

The purpose of the µF capacitor tied from VCAP to ground in the Simtek STK14C device is to provide a charge storage capacitor for the AutoStore ™ operation. This stored charge will be used by the chip to perform a single STORE operation. The capacitor size must be between 68 µF and 220µF (±20%) rated at 6V. When VCCX is tied to ground and +5V is applied to VCAP, this is known as the AutoStore ™ Inhibit mode, where STORE operations are only initiated by explicit request using software control or the HSB pin. It is important to note that it is not permissible to change between the different modes "on the fly."

The STORE operation in the Simtek STK14C88 can be initiated through a software STORE cycle, which is initiated by executing sequential E controlled READ cycles from six specific address locations. During the STORE cycle, an erase of the previous nonvolatile data is first performed, followed by a program of the nonvolatile elements. Once a STORE cycle is initiated, further input and output are disabled until the cycle is completed. It is important that no other READ or WRITE accesses intervene in the sequence, or the sequence will be aborted, and no STORE or RECALL will take place. The specific READ sequence must be performed to initiate the software STORE cycle.

The Simtek STK14C88 is available in the following packages: 1. Plastic 32-pin 300 mil SOIC (N) 2. Plastic 32-pin 600 mil DIP (W) 3. Ceramic 32-pad LCC (L) 4. Ceramic 32-pin 300 mil CDIP (C) 5. Ceramic 32-pin 300 mil CDIP with solder dip finish (K) .