STK14EC8 datasheet(14/19 Pages) SIMTEK

14 / 19 page

Simtek Confidential

Jan, 2008

Document Control #ML0060 Rev 1.1

STK14EC8

Preliminary

PREVENTING AUTOSTORE

The AutoStore function can be disabled by initiating

an AutoStore Disable sequence. A sequence of

READ operations is performed in a manner similar

to the software STORE initiation. To initiate the

AutoStore

Disable

sequence,

the

following

sequence of E controlled or G controlled READ

operations must be performed:

The AutoStore can be re-enabled by initiating an

AutoStore Enable sequence. A sequence of READ

operations is performed in a manner similar to the

software

RECALL

initiation.

initiate

the

AutoStore

Enable

sequence,

the

following

sequence of E controlled or G controlled READ

operations must be performed:

If the AutoStore function is disabled or re-enabled,

a manual STORE operation (Hardware or Soft-

ware) needs to be issued to save the AutoStore

state through subsequent power down cycles. The

part comes from the factory with AutoStore

enabled, but best design practice is to set the

enable or disable state during each power-up

sequence and not depend on this factory default

condition. Simtek recommends users configure the

part completely for the specific application.

1 Read Address

0x4E38

Valid READ

2 Read Address

0xB1C7 Valid READ

3 Read Address

0x83E0

Valid READ

4 Read Address

0x7C1F

Valid READ

5 Read Address

0x703F

Valid READ

6 Read Address

0x8B45

AutoStore Disable

1 Read Address

0x4E38

Valid READ

2 Read Address

0xB1C7 Valid READ

3 Read Address

0x83E0

Valid READ

4 Read Address

0x7C1F

Valid READ

5 Read Address

0x703F

Valid READ

6 Read Address

0x4B46

AutoStore Enable

Figure 4 - Current vs Cycle Time

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