Embedded applications increasingly want more
integration and power, in less space for less cost. Using
low power Serial EEPROMs (SEE) for application
firmware, lookup tables, and microcode coupled with
small footprints makes for permanent storage at
respectable savings. One additional method of saving
on the power budget is selectively powering off
components when not needed, a basic for embedded
power management. The low-power SEEs offered by
Microchip Technology Inc., offer an additional benefit,
powering the SEE from a microcontroller port. This
allows the host controller to not only manipulate the
Serial EEPROM Reads and Write, but also the periods
when it is powered off or on. Satellite communications
use this technique to save power and total dose
accumulation. We call this technique POWER PORT
.
The microcontroller port must have sufficient Ioh
(source current) to sustain the voltage and current for
all memory functions, READ, ERASE, and WRITE.
Obviously, not all memory or peripheral devices could
be powered thusly, but Microchip’s SEE devices will
function in this environment. AN535
Logic Powered Serial EEPROMs
Authore: Richard J. Fisher Parameter Conditions
Microchip Technology Inc.
Bruce Negley ICC STANDBY Not in an active operation while
Microchip Technolgy Inc. VCC is supplied.
ICC READ The part is in a READ operation.
Embedded applications increasingly want more ICC PEAK The BYTE / PAGE WRITE and
integration and power, in less space for less cost. Using WRITE ERAS……
