AT90USB647-MU Atmel, AT90USB647-MU Datasheet - Page 365

• Manufacturer Part Number: AT90USB647-MU
• Description: MCU, 8BIT, 64K FLASH, USB, 64QFN
• Manufacturer: Atmel

Specifications of AT90USB647-MU

• Controller Family/series: AT90
• No. Of I/o's: 48
• Eeprom Memory Size: 2KB
• Ram Memory Size: 4KB
• Cpu Speed: 16MHz
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 64KB
• Oscillator Type: External, Internal
• Package: 64QFN EP
• Device Core: AVR
• Family Name: AT90
• Maximum Speed: 20 MHz
• Ram Size: 4 KB
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 48
• Interface Type: SPI/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 4
• Lead Free Status / Rohs Status: Details

7593K–AVR–11/09
Table 28-10.
Note:
See
Z-pointer during Self-Programming.
Variable
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
ZPAGEMSB
PAGEMSB
PCWORD
ZPCMSB
PCPAGE
PCMSB
“Addressing the Flash During Self-Programming” on page 357
1. Z0: should be zero for all SPM commands, byte select for the (E)LPM instruction.
Explanation of different variables used in
pointer
PC[16:7]
PC[15:7]
PC[6:0]
PC[6:0]
15
6
6
Corresponding
Z-value
Z17:Z8
Z16:Z7
Z7:Z1
Z7:Z1
Z17
Z16
Z7
Z7
Description
Most significant bit which is used to address the
words within one page (128 words in a page requires
seven bits PC [6:0]).
Bit in Z-pointer that is mapped to PCMSB. Because
Z0 is not used, the ZPCMSB equals PCMSB + 1.
Bit in Z-pointer that is mapped to PCMSB. Because
Z0 is not used, the ZPAGEMSB equals PAGEMSB +
1.
Program Counter page address: Page select, for
Page Erase and Page Write
Program Counter word address: Word select, for
filling temporary buffer (must be zero during Page
Write operation)
Most significant bit in the program counter. (The program
counter is 16 bits PC[15:0])
Most significant bit which is used to address the words
within one page (128 words in a page requires 7 bits PC
[6:0]).
Bit in Z-register that is mapped to PCMSB. Because Z0 is
not used, the ZPCMSB equals PCMSB + 1.
Bit in Z-register that is mapped to PAGEMSB. Because Z0
is not used, the ZPAGEMSB equals PAGEMSB + 1.
Program counter page address: Page select, for Page
Erase and Page Write.
Program counter word address: Word select, for filling
temporary buffer (must be zero during PAGE WRITE
operation).
Figure 28-4
(1)
AT90USB64/128
and the mapping to the Z-
for details about the use of
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