ATmega32U2 datasheet(263/314 Pages) ATMEL

Part #	ATmega32U2

Description	8-bit Microcontroller with 8/16/32K Bytes of ISP Flash and USB Controller

PDF	314 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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263 / 314 page

263

7799B–AVR–07/09

ATmega8U2/16U2/32U2

Note:

a = address high bits, b = address low bits, c = address extended bits, H = 0 - Low byte, 1 - High Byte, o = data out, i = data in,

x = don’t care

25.9.2

Serial Programming Characteristics

For characteristics of the Serial Programming module see “SPI Timing Characteristics” on page

269.

Read Extended Fuse Bits

0101 0000

0000 1000

xxxx xxxx

oooo oooo

Read Extended Fuse bits. “0” = pro-

grammed, “1” = unprogrammed. See

Table 25-3 on page 247 for details.

Read Calibration Byte

0011 1000

000x xxxx

0000 0000

oooo oooo

Read Calibration Byte

Poll RDY/BSY

1111 0000

0000 0000

xxxx xxxx

xxxx xxxo

If o = “1”, a programming operation is

still busy. Wait until this bit returns to

“0” before applying another command.

Table 25-16. Serial Programming Instruction Set (Continued)

Instruction

Instruction Format

Operation

Byte 1

Byte 2

Byte 3

Byte4

ATmega32U2 Datasheet(PDF) 263 Page - ATMEL Corporation