Datasheet

142
32072H–AVR32–10/2012
AT32UC3A3
•PAGEN: Page number
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.
• KEY: Write protection key
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
Table 12-6. Semantic of PAGEN field in different commands
Command PAGEN description
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
Table 12-5. Set of commands
Command Value Mnemonic