ATtiny43U datasheet(146/182 Pages) ATMEL

146 / 182 page

146

8048B–AVR–03/09

ATtiny43U

Set BS1 to “1”. This selects high data byte.

Set XA1, XA0 to “01”. This enables data loading.

Set DATA = Data high byte (0x00 - 0xFF).

Give CLKI a positive pulse. This loads the data byte.

E. No action

F. Repeat B through E until the entire buffer is filled or until all data within the page is loaded.

While the lower bits in the address are mapped to words within the page, the higher bits address

the pages within the FLASH. This is illustrated in Figure 19-2 on page 147. Note that if less than

eight bits are required to address words in the page (pagesize < 256), the most significant bit(s)

in the address low byte are used to address the page when performing a Page Write.

G. Load Address High byte

Set XA1, XA0 to “00”. This enables address loading.

Set BS1 to “1”. This selects high address.

Set DATA = Address high byte (0x00 - 0xFF).

Give CLKI a positive pulse. This loads the address high byte.

H. Program Page

Give WR a negative pulse. This starts programming of the entire page of data.

RDY/BSY goes low.

Wait until RDY/BSY goes high (See Figure 19-3 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. Set XA1, XA0 to “10”. This enables command loading.

Set DATA to “0000 0000”. This is the command for No Operation.

Give CLKI a positive pulse. This loads the command, and the internal write signals are

reset.

ATtiny43U Datasheet(PDF) 146 Page - ATMEL Corporation