30.1 Configuration Bits

In dsPIC33CK512MP608 family devices, the Configuration Words are implemented as volatile memory. This means that configuration data will get loaded to volatile memory (from the Flash Configuration Words) each time the device is powered up. Configuration data are stored at the end of the on-chip program memory space, known as the Flash Configuration Words. Their specific locations are shown in Table 30-1. The configuration data are automatically loaded from the Flash Configuration Words to the proper Configuration Shadow registers during device Resets.

When creating applications for these devices, users should always specifically allocate the location of the Flash Configuration Words for configuration data in their code for the compiler. This is to make certain that program code is not stored in this address when the code is compiled. Program code executing out of configuration space will cause a device Reset.

Note: Performing a page erase operation on the last page of program memory clears the Flash Configuration Words.

Table 30-1. dsPIC33CKXXXMPX0X Configuration Addresses
Register Name	Single Partition		Dual Partition, Active		Dual Partition, Inactive
Register Name	256k Address	512k Address	256k Address	512k Address	256k Address	512k Address
FSEC⁽¹⁾	0x02BF00	0x057F00	0x015F00	0x02BF00	0x415F00	0x42BF00
FBSLIM⁽¹⁾	0x02BF10	0x057F10	0x015F10	0x02BF10	0x415F10	0x42BF10
FSIGN⁽¹⁾	0x02BF14	0x057F14	0x015F14	0x02BF14	0x415F14	0x42BF14
FOSCSEL	0x02BF18	0x057F18	0x015F18	0x02BF18	0x415F18	0x42BF18
FOSC	0x02BF1C	0x057F1C	0x015F1C	0x02BF1C	0x415F1C	0x42BF1C
FWDT	0x02BF20	0x057F20	0x015F20	0x02BF20	0x415F20	0x42BF20
FPOR	0x02BF24	0x057F24	0x015F24	0x02BF24	0x415F24	0x42BF24
FICD	0x02BF28	0x057F28	0x015F28	0x02BF28	0x415F28	0x42BF28
FDMTIVTL	0x02BF2C	0x057F2C	0x015F2C	0x02BF2C	0x415F2C	0x42BF2C
FDMTIVTH	0x02BF30	0x057F30	0x015F30	0x02BF30	0x415F30	0x42BF30
FDMTCNTL	0x02BF34	0x057F34	0x015F34	0x02BF34	0x415F34	0x42BF34
FDMTCNTH	0x02BF38	0x057F38	0x015F38	0x02BF38	0x415F38	0x42BF38
FDMT	0x02BF3C	0x057F3C	0x015F3C	0x02BF3C	0x415F3C	0x42BF3C
FDEVOPT	0x02BF40	0x057F40	0x015F40	0x02BF40	0x415F40	0x42BF40
FALTREG	0x02BF44	0x057F44	0x015F44	0x02BF44	0x415F44	0x42BF44
FALTSEQ	0x02BFFC	0x057FFC	0x015FFC	0x02BFFC	0x415FFC	0x42BFFC
FBOOT⁽²⁾	0x801800
Note: Changes to the Inactive Partition Configuration Words affect how the Active Partition accesses the Inactive Partition. FBOOT resides in calibration memory space.

Table 30-2. dsPIC33CKXXXMPX0X Configuration Addresses
Register Name	Single Partition		Dual Partition, Active		Dual Partition, Inactive
Register Name	64k Address	32k Address	64k Address	32k Address	64k Address	32k Address
FSEC⁽¹⁾	0x00AF00	0x005F00	0x005700	0x002F00	0x405700	0x402F00
FBSLIM⁽¹⁾	0x00AF10	0x005F10	0x005710	0x002F10	0x405710	0x402F10
FSIGN⁽¹⁾	0x00AF14	0x005F14	0x005714	0x002F14	0x405714	0x402F14
FOSCSEL	0x00AF18	0x005F18	0x005718	0x002F18	0x405718	0x402F18
FOSC	0x00AF1C	0x005F1C	0x00571C	0x002F1C	0x40571C	0x402F1C
FWDT	0x00AF20	0x005F20	0x005720	0x002F20	0x405720	0x402F20
FPOR	0x00AF24	0x005F24	0x005724	0x002F24	0x405724	0x402F24
FICD	0x00AF28	0x005F28	0x005728	0x002F28	0x405728	0x402F28
FDMTIVTL	0x00AF2C	0x005F2C	0x00572C	0x002F2C	0x40572C	0x402F2C
FDMTIVTH	0x00AF30	0x005F30	0x005730	0x002F30	0x405730	0x402F30
FDMTCNTL	0x00AF34	0x005F34	0x005734	0x002F34	0x405734	0x402F34
FDMTCNTH	0x00AF38	0x005F38	0x005738	0x002F38	0x405738	0x402F38
FDMT	0x00AF3C	0x005F3C	0x00573C	0x002F3C	0x40573C	0x402F3C
FDEVOPT	0x00AF40	0x005F40	0x005740	0x002F40	0x405740	0x402F40
FALTREG	0x00AF44	0x005F44	0x005744	0x002F44	0x405744	0x402F44
FALTSEQ	0x00AFFC	0x005FFC	0x0057FC	0x002FFC	0x4057FC	0x402FFC
FBOOT⁽²⁾	0x801800
Note: Changes to the Inactive Partition Configuration Words affect how the Active Partition accesses the Inactive Partition. FBOOT resides in calibration memory space.