Rainbow-electronics ATmega163L Manuel d'utilisateur télécharger pdf (Page 128)

ATmega163(L)

128

Figure 82. Programming the Flash Waveforms

Figure 83. Programming the Flash Waveforms (continued)

Programming the EEPROM

The programming algorithm for the EEPROM data memory is as follows (refer to “Programming the Flash” on page 126 for

details on Command, Address and Data loading):

1. A: Load Command ‘0001 0001’.

2. H: Load Address High Byte ($00 - $01)

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

4. E: Load Data Low Byte ($00 - $FF)

L: Write Data Low Byte

1. Set BS to ‘0’. This selects low data.

2. Give WR

a negative pulse. This starts programming of the data byte. RDY/BSY goes low.

$10 ADDR. LOW ADDR. HIGH DATA LOWDATA

XA1

XA2

BS1

XTAL1

RDY/BSY

RESET

WR

OE

+12V

BS2

PAGEL

DATA HIGH

DATA

XA1

XA0

BS1

XTAL1

WR

RDY/BSY

RESET

+12V

OE

BS2

PAGEL

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