ATtiny48 datasheet(193/266 Pages) ATMEL

193 / 266 page

193

8008C–AVR–03/09

ATtiny48/88

follows (refer to “Programming the Flash” on page 190 for details on Command, Address and

Data loading):

A: Load Command “0001 0001”.

G: Load Address High Byte (0x00 – 0xFF).

B: Load Address Low Byte (0x00 – 0xFF).

C: Load Data (0x00 – 0xFF).

E: Latch data (give PAGEL a positive pulse).

K: Repeat 3 through 5 until the entire buffer is filled.

L: Program EEPROM page

Set BS1 to “0”.

Give WR a negative pulse. This starts programming of the EEPROM page. RDY/BSY

goes low.

Wait until to RDY/BSY goes high before programming the next page (See Figure 20-4

for signal waveforms).

Figure 20-4. Programming the EEPROM Waveforms

20.7.6

Reading the Flash

The algorithm for reading the Flash memory is as follows (refer to “Programming the Flash” on

page 190 for details on Command and Address loading):

A: Load Command “0000 0010”.

G: Load Address High Byte (0x00 – 0xFF).

B: Load Address Low Byte (0x00 – 0xFF).

Set OE to “0”, and BS1 to “0”. The Flash word low byte can now be read at DATA.

Set BS1 to “1”. The Flash word high byte can now be read at DATA.

Set OE to “1”.

RDY/BSY

RESET +12V

PAGEL

BS2

0x11

ADDR. HIGH

DATA

ADDR. LOW

DATA

ADDR. LOW

DATA

XA1

XA0

BS1

CLKI

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