AT90PWM2B-16SU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90PWM2B-16SU

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

Atmel Corporation 

Figure 25-11. Serial Programming Waveforms

SERIAL DATA INPUT

(MOSI)

MSB

SERIAL DATA OUTPUT

(MISO)

MSB

SERIAL CLOCK INPUT

(SCK)

SAMPLE

AT90PWM2/3/2B/3B

LSB

LSB

Table 25-16. Serial Programming Instruction Set

Instruction Format

Instruction

Byte 1

Byte 2

Byte 3

Programming Enable

1010 1100 0101 0011 xxxx xxxx

Chip Erase

Read Program Memory

1010 1100 100x xxxx xxxx xxxx

0010 H000 000a aaaa bbbb bbbb

0100 H000 000x xxxx xxbb bbbb

Load Program Memory Page

Write Program Memory Page 0100 1100 000a aaaa bbxx xxxx

Read EEPROM Memory

1010 0000 000x xxaa bbbb bbbb

Write EEPROM Memory

1100 0000 000x xxaa bbbb bbbb

Load EEPROM Memory

Page (page access)

1100 0001 0000 0000 0000 00bb

Write EEPROM Memory

Page (page access)

Read Lock bits

1100 0010 00xx xxaa bbbb bb00

0101 1000 0000 0000 xxxx xxxx

Write Lock bits

1010 1100 111x xxxx xxxx xxxx

Read Signature Byte

Write Fuse bits

0011 0000 000x xxxx xxxx xxbb

1010 1100 1010 0000 xxxx xxxx

Byte4

xxxx xxxx

xxxx xxxx

oooo oooo

iiii iiii

xxxx xxxx

oooo oooo

iiii iiii

iiii iiii

xxxx xxxx

xxoo oooo

11ii iiii

oooo oooo

iiii iiii

Operation

Enable Serial Programming after

RESET goes low.

Chip Erase EEPROM and Flash.

Read H (high or low) data o from

Program memory at word address a:b.

Write H (high or low) data i to Program

Memory page at word address b. Data

low byte must be loaded before Data

high byte is applied within the same

address.

Write Program Memory Page at

address a:b.

Read data o from EEPROM memory at

address a:b.

Write data i to EEPROM memory at

address a:b.

Load data i to EEPROM memory page

buffer. After data is loaded, program

EEPROM page.

Write EEPROM page at address a:b.

Read Lock bits. “0” = programmed, “1”

= unprogrammed. See Table 25-1 on

page 280 for details.

Write Lock bits. Set bits = “0” to

program Lock bits. See Table 25-1 on

page 280 for details.

Read Signature Byte o at address b.

Set bits = “0” to program, “1” to

unprogram. See Table XXX on page

XXX for details.

4317K–AVR–03/2013

298

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