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AT90LS4433-4AI Datasheet(PDF) 95 Page - ATMEL Corporation

Part # AT90LS4433-4AI
Description  8-Bit AVR Microcontroller with 4K Bytes of In-System Programmable Flash
PDF  126 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90LS4433-4AI Datasheet(HTML) 95 Page - ATMEL Corporation

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AT90S/LS4433
1042H–AVR–04/03
Data Polling Flash
When a byte is being programmed into the Flash, reading the address location being
programmed will give the value $FF. At the time the device is ready for a new byte, the
programmed value will read correctly. This is used to determine when the next byte can
be written. This will not work for the value $FF, so when programming this value, the
user will have to wait for at least t
WD_PROG before programming the next byte. As a chip-
erased device contains $FF in all locations, programming of addresses that are meant
to contain $FF can be skipped.
Figure 67. Serial Programming Waveforms
MSB
MSB
LSB
LSB
SERIAL CLOCK INPUT
PB5(SCK)
SERIAL DATA INPUT
PB3(MOSI)
SERIAL DATA OUTPUT
PB4(MISO)



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