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70592C датащи(PDF) 59 Page - Microchip Technology

номер детали 70592C
подробное описание детали  High-Performance, 16-bit Microcontrollers
PDF  314 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

70592C датащи(HTML) 59 Page - Microchip Technology

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© 2011 Microchip Technology Inc.
DS70592C-page 59
PIC24HJXXXGPX06A/X08A/X10A
For remapping operations, the 8-bit Program Space
Visibility register (PSVPAG) is used to define a
16K word page in the program space. When the Most
Significant bit of the EA is ‘1’, PSVPAG is concatenated
with the lower 15 bits of the EA to form a 23-bit program
space address. Unlike table operations, this limits
remapping operations strictly to the user memory area.
Table 4-35 and Figure 4-6 show how the program EA is
created for table operations and remapping accesses
from the data EA. Here, P<23:0> refers to a program
space word, whereas D<15:0> refers to a data space
word.
TABLE 4-35:
PROGRAM SPACE ADDRESS CONSTRUCTION
Access Type
Access
Space
Program Space Address
<23>
<22:16>
<15>
<14:1>
<0>
Instruction Access
(Code Execution)
User
0
PC<22:1>
0
0xxx
xxxx
xxxx
xxxx
xxxx xxx0
TBLRD/TBLWT
(Byte/Word Read/Write)
User
TBLPAG<7:0>
Data EA<15:0>
0xxx xxxx
xxxx xxxx xxxx xxxx
Configuration
TBLPAG<7:0>
Data EA<15:0>
1xxx xxxx
xxxx xxxx xxxx xxxx
Program Space Visibility
(Block Remap/Read)
User
0
PSVPAG<7:0>
Data EA<14:0>(1)
0
xxxx xxxx
xxx xxxx xxxx xxxx
Note 1: Data EA<15> is always ‘1’ in this case, but is not used in calculating the program space address. Bit 15 of
the address is PSVPAG<0>.



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