Rainbow-electronics ATtiny26L Bedienungsanleitung PDF herunterladen (Seite 114)

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ATtiny26(L)

1477B–AVR–04/02

Figure 60. Programming the Flash Waveforms

(1)

Note: 1. “XX” is don’t care. The letters refer to the programming description above.

Programming the EEPROM The EEPROM is organized in pages, see Table 56 on page 110. When programming

the EEPROM, the program data is latched into a page buffer. This allows one page of

data to be programmed simultaneously. The programming algorithm for the EEPROM

data memory is as follows (refer to “Programming the Flash” on page 112 for details on

Command, Address and Data loading):

1. A: Load Command “0001 0001”.

2. B: Load Address Low Byte ($00 - $FF).

3. C: Load Data ($00 - $FF).

J: Repeat 2 and 3 until the entire buffer is filled

K: Program EEPROM page

1. Set BS1 to “0”.

2. Give WR

a negative pulse. This starts programming of the EEPROM page.

RDY/BSY

goes low.

3. Wait until to RDY/BSY goes high before programming the next page.

(See Figure 61 for signal waveforms.)

RDY/BSY

RESET +12V

$10 ADDR. LOW

ADDR. HIGH

DATA

DATA LOW DATA HIGH ADDR. LOW DATA LOW DATA HIGH

XA1/BS2

XA0

PAGEL/BS1

XTAL1

AB CDB CDFG

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Rainbow-electronics ATtiny26L Bedienungsanleitung Seite 114