Atmel Xplained Evaluation Board AT32UC3A3-XPLD AT32UC3A3-XPLD Data Sheet

32072H–AVR32–10/2012

The PAGEN field is used to address a page or fuse bit for certain operations. In order to simplify programming, the PAGEN field 

is automatically updated every time the page buffer is written to. For every page buffer write, the PAGEN field is updated with the 

page number of the address being written to. Hardware automatically masks writes to the PAGEN field so that only bits 

representing valid page numbers can be written, all other bits in PAGEN are always 0. As an example, in a flash with 1024 

pages (page 0 - page 1023), bits 15:10 will always be 0.

This field should be written with the value 0xA5 to enable the command defined by the bits of the register. If the field is written 

with a different value, the write is not performed and no action is started.

This field always reads as 0.

Quick Page Read User Page

15

QPRUP

Read High Speed Enable

16

HSEN

Read High Speed Disable

17

HSDIS

Semantic of PAGEN field in different commands

No operation

Not used

Write Page

The number of the page to write

Clear Page Buffer

Not used

Lock region containing given Page

Page number whose region should be locked

Unlock region containing given Page

Page number whose region should be unlocked

Erase All

Not used

Write General-Purpose Fuse Bit

GPFUSE #

Erase General-Purpose Fuse Bit

GPFUSE #

Set Security Bit

Not used

Program GP Fuse Byte

WriteData[7:0], ByteAddress[2:0]

Erase All GP Fuses

Not used

Quick Page Read

Page number

Write User Page

Not used

Erase User Page

Not used

Quick Page Read User Page

Not used

Set of commands