Rainbow-electronics ATmega163L Bedienungsanleitung PDF herunterladen (Seite 131)

ATmega163(L)

131

3. Set OE

to ‘0’, BS2 to ‘1’ and BS1 to ‘1’. The status of the Fuse High bits can now be read at DATA (‘0’ means pro-

grammed).

Bit 2..1 = BOOTSZ1..0 Fuse bits

Bit 0 = BOOTRST Fuse bit

4. Set OE

to ‘0’, BS2 to ‘0’ and BS1 to ‘1’. The status of the Lock bits can now be read at DATA (‘0’ means pro-

grammed).

Bit 5 = Boot Lock Bit12

Bit 4 = Boot Lock Bit11

Bit 3 = Boot Lock Bit02

Bit 2 = Boot Lock Bit01

Bit 1 = Lock Bit2

Bit 0 = Lock Bit1

5. 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).

3. Set OE

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

4. Set OE to ‘1’.

Reading the Calibration Byte

The algorithm for reading the Calibration byte 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.

Set OE

to ‘0’, and BS1 to ‘1’. The Calibaration byte can now be read at DATA.

3. Set OE to ‘1’.

Parallel Programming Characteristics

Figure 85. Parallel Programming Timing

Data & Contol

(DATA, XA0/1, BS1, BS2)

DATA

Write

Read

XTAL1

XHXL

WLWH

DVXH

XLOL

OLDV

XLDX

PLWL

WLRH

RDY/BSY

PAGEL

PHPL

PLBX

BVPH

XLWL

RHBX

OHDZ

BVWL

WLRL

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