Rainbow-electronics ATmega103L Instrukcja Użytkownika Pobierz pdf (Strona 100)

ATmega603/103

100

Reading the Fuse and Lock Bits

The algorithm for reading the Fuse and Lock bits is as follows (refer to Programming the Flash for details on Command

loading):

1. A: Load Command ‘0000 0100’.

2. Set OE

to ‘0’, and BS to ‘0’. The status of the Fuse bits can now be read at DATA (‘0’ means programmed).

Bit 5 = SPIEN Fuse bit

Bit 3 = EESAVE Fuse bit

Bit 1 = SUT1 Fuse bit

Bit 0 = SUT0 Fuse bit

Set OE

to ‘0’, and BS to ‘1’. The status of the Lock bits can now be read at DATA (‘0’ means programmed).

Bit 2 = Lock Bit2

Bit 1 = Lock Bit1

3. Set OE

to ‘1’.

Reading the Signature Bytes

The algorithm for reading the Signature bytes is as follows (refer to Programming the Flash for details on Command and

Address loading):

1. A: Load Command ‘0000 1000’.

2. C: Load Address Low Byte ($00 - $02).

Set OE

to ‘0’, and BS to ‘0’. The selected Signature byte can now be read at DATA.

3. Set OE

to ‘1’.

Parallel Programming Characteristics

Figure 76. Parallel Programming Timing

Data & Contol

(DATA, XA0/1, BS1)

DATA

Write

Read

XTAL1

XHXL

WLWH

DVXH

XLOL

OLDV

XLDX

PLWL

WHRL

WLRH

RDY/BSY

PAGEL

PHPL

PLBX

BVXH

XLWL

RHBX

OHDZ

BVWL

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 125 126

Komentarze do niniejszej Instrukcji

Brak uwag

Rainbow-electronics ATmega103L Instrukcja Użytkownika Strona 100

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Czujniki Rainbow-electronics ATmega103L