AT90USB1286-16MU ATMEL [ATMEL Corporation], AT90USB1286-16MU Datasheet - Page 367
![no-image](/images/no-image-200.jpg)
AT90USB1286-16MU
Manufacturer Part Number
AT90USB1286-16MU
Description
Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT90USB1286-16MU.pdf
(434 pages)
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7593A–AVR–02/06
Table 28-9.
Note:
Table 28-10.
Note:
See
Z-pointer during Self-Programming.
Device
AT90USB64
AT90USB28
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
ZPAGEMSB
PAGEMSB
PCWORD
ZPCMSB
PCPAGE
PCMSB
“Addressing the Flash During Self-Programming” on page 360
1. For details about these two section, see
1. Z0: should be zero for all SPM commands, byte select for the (E)LPM instruction.
353
Read-While-Write Limit (Word Addresses)
Explanation of different variables used in
pointer
and
PC[16:7]
PC[15:7]
PC[6:0]
PC[6:0]
“RWW – Read-While-Write Section” on page
16
15
6
6
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Corresponding
Z-value
Z17:Z8
Z16:Z7
Z7:Z1
Z7:Z1
Z17
Z16
Z7
Z7
Description
Most significant bit in the Program Counter. (The
Program Counter is 17 bits PC[16:0])
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).
“NRWW – No Read-While-Write Section” on page
Figure 28-4
(1)
(1)
353.
Pages
AT90USB64/128
224
480
32
32
and the mapping to the Z-
for details about the use of
Address
0x0000 - 0x6FFF
0x7000 - 0x7FFF
0x0000 - 0xEFFF
0xF000 - 0xFFFF
367
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