Rainbow-electronics AT90S2313 Manual do Utilizador descarregar pdf (Página 63)

AT90S2313

0839I–AVR–06/02

5. Give WR a t

WLWH_CE

wide negative pulse to execute Chip Erase. See Table 26

for

WLWH_CE

value. Chip Erase does not generate any activity on the RDY/BSY

pin.

Programming the Flash A: Load Command “Write Flash”

1. SetXA1,XA0to“10”. This enables command loading.

2. Set BS to “0”.

3. Set DATA to “0001 0000”. This is the command for Write Flash.

4. Give XTAL1 a positive pulse. This loads the command.

B: Load Address High Byte

1. SetXA1,XA0to“00”. This enables address loading.

2. Set BS to “1”. This selects high byte.

3. Set DATA = Address high byte ($00 - $03).

4. Give XTAL1 a positive pulse. This loads the address high byte.

C: Load Address Low Byte

1. SetXA1,XA0to“00”. This enables address loading.

2. Set BS to “0”. This selects low byte.

3. Set DATA = Address low byte ($00 - $FF).

4. Give XTAL1 a positive pulse. This loads the address low byte.

D: Load Data Low Byte

1. SetXA1,XA0to“01”. This enables data loading.

2. Set DATA = Data low byte ($00 - $FF).

3. Give XTAL1 a positive pulse. This loads the data low byte.

E: 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.

3. Wait until RDY/BSY

goes high to program the next byte.

(See Figure 50 for signal waveforms.)

F: Load Data High Byte

1. SetXA1,XA0to“01”. This enables data loading.

2. Set DATA = Data high byte ($00 - $FF).

3. Give XTAL1 a positive pulse. This loads the data high byte.

G:WriteDataHighByte

1. Set BS to “1”. This selects high data.

2. Give WR

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

goes low.

3. Wait until RDY/BSY

goes high to program the next byte.

(See Figure 51 for signal waveforms.)

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 91 92

Comentários a estes Manuais

Sem comentários

Rainbow-electronics AT90S2313 Manual do Utilizador Página 63

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics AT90S2313