AT32UC3C1512C Automotive Atmel Corporation, AT32UC3C1512C Automotive Datasheet - Page 256

• Manufacturer Part Number: AT32UC3C1512C Automotive
• Manufacturer: Atmel Corporation

15.4.7
15.4.8
9166C–AVR-08/11
Quick Page Read
Page Buffer Operations
Figure 15-2. High Speed Mode
A dedicated command, Quick Page Read (QPR), is provided to read all words in an addressed
page. All bits in all words in this page are AND’ed together, returning a 1-bit result. This result is
placed in the Quick Page Read Result (QPRR) bit in Flash Status Register (FSR). The QPR
command is useful to check that a page is in an erased state. The QPR instruction is much
faster than performing the erased-page check using a regular software subroutine.
The flash memory has a write and erase granularity of one page; data are written and erased in
chunks of one page. When programming a page, the user must first write the new data into the
Page Buffer. The contents of the entire Page Buffer is copied into the desired page in flash
memory when the user issues the Write Page command,
In order to program data into flash page Y, write the desired data to locations Y0 to 63 in the reg-
ular flash memory map. Writing to an address A in the flash memory map will not update the
flash memory, but will instead update location A%64 in the page buffer. The PAGEN field in the
Flash Command (FCMD) register will at the same time be updated with the value A/64.
Frequency
Speed mode
Frequency limit
for 0 wait state
operation
1 wait state
0 wait state
See Section “15.5.1” on page 258.
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