ATA5505 Datasheet, PDF (244/294 Pages) ATMEL Corporation – High Performance, Low Power Atmel AVR 8-bit Microcontroller Advanced RISC Architecture

G. Load Address High byte
1. Set XA1, XA0 to “0,0”. This enables address loading.
2. Set BS1 to “1”. This selects high address.
3. Set DATA = Address high byte (0x00 - 0xFF).
4. Give XTAL1 a positive pulse. This loads the address high byte.
H. Program Page
1. Give WR a negative pulse. This starts programming of the entire page of data.
RDY/BSY goes low.
2. Wait until RDY/BSY goes high (See Figure 22-3 for signal waveforms).
I. Repeat B through H until the entire Flash is programmed or until all data has been
programmed.
J. End Page Programming
1. 1. Set XA1, XA0 to “1,0”. This enables command loading.
2. Set DATA to “0000 0000 _b”. This is the command for No Operation.
3. Give XTAL1 a positive pulse. This loads the command, and the internal write signals
are reset.
Figure 22-2. Addressing the Flash Which is Organized in Pages
PCMSB
PROGRAM COUNTER
PCPAGE
PAGE ADDRESS
WITHIN THE FLASH
PROGRAM MEMORY
PAGE
PAGEMSB
PCWORD
WORD ADDRESS
WITHIN A PAGE
PAGE
INSTRUCTION WORD
PCWORD[PAGEMSB:0]:
00
01
02
PAGEEND
Note: 1. PCPAGE and PCWORD are listed in
244 Atmel ATA5505 [Preliminary]
9219A–RFID–01/11