Datasheet

 2011-2017 Microchip Technology Inc. DS30009995E-page 239
PIC24FV32KA304 FAMILY
26.0 SPECIAL FEATURES
PIC24FV32KA304 family devices include several
features intended to maximize application flexibility and
reliability, and minimize cost through elimination of
external components. These are:
• Flexible Configuration
• Watchdog Timer (WDT)
• Code Protection
• In-Circuit Serial Programming™ (ICSP™)
• In-Circuit Emulation
26.1 Configuration Bits
The Configuration bits can be programmed (read as
‘0’), or left unprogrammed (read as ‘1’), to select vari-
ous device configurations. These bits are mapped,
starting at program memory location, F80000h. A
complete list of Configuration register locations is
provided in Tabl e 2 6- 1. A detailed explanation of the
various bit functions is provided in Register 26-1
through Register 26-8.
The address, F80000h, is beyond the user program
memory space. In fact, it belongs to the configuration
memory space (800000h-FFFFFFh), which can only be
accessed using Table Reads and Table Writes.
TABLE 26-1: CONFIGURATION REGISTERS
LOCATIONS
REGISTER 26-1: FBS: BOOT SEGMENT CONFIGURATION REGISTER
Note: This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. For more information on the Watch-
dog Timer, High-Level Device Integration
and Programming Diagnostics, refer to the
individual sections of the “dsPIC33/PIC24
Family Reference Manual” provided below:
•
“Watchdog Timer (WDT)” (DS39697)
• “High-Level Integration with
Programmable High/Low-Voltage
Detect (HLVD)”
(DS39725)
• Section 33. “Programming and
Diagnostics”
(DS39716)
Configuration
Register
Address
FBS F80000
FGS F80004
FOSCSEL F80006
FOSC F80008
FWDT F8000A
FPOR F8000C
FICD F8000E
FDS F80010
U-0 U-0 U-0 U-0 R/W-1 R/W-1 R/W-1 R/W-1
— — — — BSS2 BSS1 BSS0 BWRP
bit 7 bit 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 7-4
Unimplemented: Read as ‘0’
bit 3-1 BSS<2:0>: Boot Segment Program Flash Code Protection bits
111 = No boot program Flash segment
011 = Reserved
110 = Standard security, boot program Flash segment starts at 200h, ends at 000AFEh
010 = High-security boot program Flash segment starts at 200h, ends at 000AFEh
101 = Standard security, boot program Flash segment starts at 200h, ends at 0015FEh
(1)
001 = High-security, boot program Flash segment starts at 200h, ends at 0015FEh
(1)
100 = Standard security; boot program Flash segment starts at 200h, ends at 002BFEh
(1)
000 = High-security; boot program Flash segment starts at 200h, ends at 002BFEh
(1)
bit 0 BWRP: Boot Segment Program Flash Write Protection bit
1 = Boot Segment may be written
0 = Boot Segment is write-protected
Note 1: This selection should not be used in PIC24FV16KA3XX devices.