MA240026 Microchip Technology, MA240026 Datasheet - Page 46

• Manufacturer Part Number: MA240026
• Description: Daughter Cards & OEM Boards PIC24FJ16MC102 Plug-In Module
• Manufacturer: Microchip Technology

Specifications of MA240026

• Rohs: yes
• Data Bus Width: 16 bit
• Description/function: PIC24F 28 Pin QFN to 100 Pin Plug-in-Module
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3 V to 3.6 V

PIC24FJ16MC101/102
4.4.1
Since the address ranges for the data and program
spaces are 16 and 24 bits, respectively, a method is
needed to create a 23-bit or 24-bit program address
from 16-bit data registers. The solution depends on the
interface method to be used.
For table operations, the 8-bit Table Page register
(TBLPAG) is used to define a 32K word region within the
program space. This is concatenated with a 16-bit EA to
arrive at a full 24-bit program space address. In this for-
mat, the MSb of TBLPAG is used to determine if the
operation occurs in the user memory (TBLPAG<7> = 0)
or the configuration memory (TBLPAG<7> = 1).
TABLE 4-28:
DS39997B-page 46
Instruction Access
(Code Execution)
TBLRD/TBLWT
(Byte/Word Read/Write)
Program Space Visibility
(Block Remap/Read)
Note 1:
Access Type
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>.
ADDRESSING PROGRAM SPACE
PROGRAM SPACE ADDRESS CONSTRUCTION
User
User
Configuration
User
Access
Space
Preliminary
<23>
0
0
0
TBLPAG<7:0>
TBLPAG<7:0>
0xxx xxxx
1xxx xxxx
0xx
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 MSb
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 4-28
created for table operations and remapping accesses
from the data EA.
<22:16>
xxxx xxxx
PSVPAG<7:0>
xxxx
Program Space Address
and
xxxx
PC<22:1>
Figure 4-5
xxxx xxxx xxxx xxxx
xxxx xxxx xxxx xxxx
<15>
xxxx
© 2011 Microchip Technology Inc.
show how the program EA is
xxx xxxx xxxx xxxx
Data EA<15:0>
Data EA<15:0>
xxxx xxx0
<14:1>
Data EA<14:0>
(1)
<0>
0