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Microchip Technology TDGL019 Data Sheet

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© 2011-2014 Microchip Technology Inc.
DS60001168F-page 77
PIC32MX1XX/2XX
REGISTER 4-5:
BMXDRMSZ: DATA RAM SIZE REGISTER
Bit 
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
R
R
R
R
R
R
R
R
BMXDRMSZ<31:24>
23:16
R
R
R
R
R
R
R
R
BMXDRMSZ<23:16>
15:8
R
R
R
R
R
R
R
R
BMXDRMSZ<15:8>
7:0
R
R
R
R
R
R
R
R
BMXDRMSZ<7:0>
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 31-0
BMXDRMSZ<31:0>:
 Data RAM Memory (DRM) Size bits
Static value that indicates the size of the Data RAM in bytes:
0x00001000 = Device has 4 KB RAM
0x00002000 = Device has 8 KB RAM
0x00004000 = Device has 16 KB RAM
0x00008000 = Device has 32 KB RAM
0x00010000 = Device has 64 KB RAM
REGISTER 4-6:
BMXPUPBA: PROGRAM FLASH (PFM) USER PROGRAM BASE ADDRESS 
REGISTER
Bit 
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
U-0
U-0
U-0
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
—
—
—
23:16
U-0
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
—
BMXPUPBA<19:16>
15:8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R-0
R-0
R-0
BMXPUPBA<15:8>
7:0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
BMXPUPBA<7:0>
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 31-20 Unimplemented: Read as ‘0’
bit 19-11 BMXPUPBA<19:11>: Program Flash (PFM) User Program Base Address bits
bit 10-0
BMXPUPBA<10:0>:
 Read-Only bits
This value is always ‘0’, which forces 2 KB increments
Note 1:
At Reset, the value in this register is forced to zero, which causes all of the RAM to be allocated to Kernal 
mode data usage.
2:
The value in this register must be less than or equal to BMXPFMSZ.