5962-92324 데이터 시트보기 (PDF) - Unspecified
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5962-92324 Datasheet PDF : 10 Pages
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STK11C68-M
Internally, RECALL is a two step procedure. First, the
SRAM data is cleared and second, the nonvolatile
information is transferred into the SRAM cells. The
RECALL operation in no way alters the data in the
EEPROM cells. The nonvolatile data can be recalled
an unlimited number of times.
On power-up, once VCC exceeds the VCC sense volt-
age of 4.0V, a RECALL cycle is automatically initiated.
The voltage on the VCC pin must not drop below 4.0V
once it has risen above it in order for the RECALL to
operate properly. Due to this automatic RECALL,
SRAM operation cannot commence until tRECALL after
VCC exceeds 4.0V. 4.0V is a typical, characterized
value.
If the STK11C68-M is in a WRITE state at the end of
power-up RECALL, the SRAM data will be corrupted.
To help avoid this situation, a 10K Ohm resistor should
be connected between W and system VCC.
4-39
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