Datasheet
© 2007-2012 Microchip Technology Inc. DS70293G-page 273
PIC24HJ32GP302/304, PIC24HJ64GPX02/X04 AND PIC24HJ128GPX02/X04
25.0 SPECIAL FEATURES
The PIC24HJ32GP302/304, PIC24HJ64GPX02/X04
and PIC24HJ128GPX02/X04 devices include the
following features that are intended to maximize
application flexibility and reliability, and minimize cost
through elimination of external components:
• Flexible configuration
• Watchdog Timer (WDT)
• Code Protection and CodeGuard™ Security
• JTAG Boundary Scan Interface
• In-Circuit Serial Programming™ (ICSP™)
• In-Circuit Emulation
25.1 Configuration Bits
The PIC24HJ32GP302/304, PIC24HJ64GPX02/X04
and PIC24HJ128GPX02/X04 devices provide nonvola-
tile memory implementation for device configuration
bits. Refer to Section 25. “Device Configuration”
(DS70194), in the “dsPIC33F/PIC24H Family
Reference Manual” for more information on this
implementation.
The Configuration bits can be programmed (read as
‘0’), or left unprogrammed (read as ‘1’), to select
various device configurations. These bits are mapped
starting at program memory location 0xF80000.
The individual Configuration bit descriptions for the
Configuration registers are shown in Table 25-1.
Note that address 0xF80000 is beyond the user program
memory space. It belongs to the configuration memory
space (0x800000-0xFFFFFF), which can only be
accessed using table reads and table writes.
The Device Configuration register map is shown in
Table 25-1.
Note 1: This data sheet summarizes the features
of the PIC24HJ32GP302/304,
PIC24HJ64GPX02/X04 and
PIC24HJ128GPX02/X04 families of
devices. It is not intended to be a compre-
hensive reference source. To comple-
ment the information in this data sheet,
refer to the “dsPIC33F/PIC24H Family
Reference Manual”. Please see the
Microchip web site (www.microchip.com)
for the latest dsPIC33F/PIC24H Family
Reference Manual sections.
2: Some registers and associated bits
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization” in
this data sheet for device-specific register
and bit information.
TABLE 25-1: DEVICE CONFIGURATION REGISTER MAP
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
0xF80000 FBS RBS<1:0> — — BSS<2:0> BWRP
0xF80002 FSS
(1)
RSS<1:0> — — SSS<2:0> SWRP
0xF80004 FGS
— — — — — GSS<1:0> GWRP
0xF80006 FOSCSEL IESO
— — —FNOSC<2:0>
0xF80008 FOSC FCKSM<1:0> IOL1WAY
— — OSCIOFNC POSCMD<1:0>
0xF8000A FWDT FWDTEN WINDIS
— WDTPRE WDTPOST<3:0>
0xF8000C FPOR Reserved
(2)
ALTI2C —FPWRT<2:0>
0xF8000E FICD Reserved
(3)
JTAGEN — — —ICS<1:0>
0xF80010 FUID0 User Unit ID Byte 0
0xF80012 FUID1 User Unit ID Byte 1
0xF80014 FUID2 User Unit ID Byte 2
0xF80016 FUID3 User Unit ID Byte 3
Legend: — = unimplemented bit, read as ‘0’.
Note 1: This Configuration register is not available and reads as 0xFF on PIC24HJ32GP302/304 devices.
2: These bits are reserved and always read as ‘1’.
3: These bits are reserved for use by development tools and must be programmed as ‘1’.