AT90PWM2B-16SU Ver la hoja de datos (PDF) - Atmel Corporation

Número de pieza

componentes Descripción

Fabricante

AT90PWM2B-16SU

8-bit Atmel Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

AT90PWM2/3/2B/3B

Figure 25-6. Mapping Between BS1, BS2 and the Fuse and Lock Bits During Read

Fuse Low Byte

0

Extended Fuse Byte

1

BS2

Lock Bits

0

0

DATA

1

Fuse High Byte

1

BS1

BS2

25.8.13

Reading the Signature Bytes

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

page 288 for details on Command and Address loading):

1. A: Load Command “0000 1000”.

2. B: Load Address Low Byte (0x00 - 0x02).

3. Set OE to “0”, and BS1 to “0”. The selected Signature byte can now be read at DATA.

4. Set OE to “1”.

25.8.14

Reading the Calibration Byte

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

page 288 for details on Command and Address loading):

1. A: Load Command “0000 1000”.

2. B: Load Address Low Byte, 0x00.

3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.

4. Set OE to “1”.

25.8.15 Parallel Programming Characteristics

Figure 25-7. Parallel Programming Timing, Including some General Timing Requirements

XTAL1

Data & Contol

(DATA, XA0/1, BS1, BS2)

PAGEL

WR

tDVXH

tXHXL

tXLWL

tXLDX

tBVPH

tPHPL

tPLBX t BVWL

tPLWL

tWLWH

WLRL

tWLBX

RDY/BSY

tWLRH

4317K–AVR–03/2013

293

Share Link: