Datasheet

© 2007-2012 Microchip Technology Inc. DS70291G-page 335
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
28.0 SPECIAL FEATURES
The dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/
X04 and dsPIC33FJ128MCX02/X04 devices include
the following features 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
28.1 Configuration Bits
The dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/
X04 and dsPIC33FJ128MCX02/X04 devices provide
nonvolatile memory implementations 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 28-2.
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 28-1.
Note 1: This data sheet summarizes the features
of the dsPIC33FJ32MC302/304,
dsPIC33FJ64MCX02/X04 and
dsPIC33FJ128MCX02/X04 family of
devices. However, it is not intended to be
a comprehensive reference source. To
complement 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 28-1: 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 PWMPIN HPOL LPOL ALTI2C
—FPWRT<2:0>
0xF8000E FICD Reserved
(2)
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 dsPIC33FJ32MC302/304 devices.
2: These bits are reserved for use by development tools and must be programmed as ‘1’.