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PIC24FJ256GA705-I/M4. Datasheet(PDF) 340 Page - Microchip Technology |
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PIC24FJ256GA705-I/M4. Datasheet(HTML) 340 Page - Microchip Technology |
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340 / 412 page  PIC24FJ256GA705 FAMILY DS30010118B-page 340 2016 Microchip Technology Inc. TABLE 29-2: PIC24FJ CORE DEVICE ID REGISTERS TABLE 29-3: DEVICE ID BIT FIELD DESCRIPTIONS TABLE 29-4: PIC24FJ256GA705 FAMILY DEVICE IDs 29.2 Unique Device Identifier (UDID) All PIC24FJ256GA705 family devices are individually encoded during final manufacturing with a Unique Device Identifier, or UDID. The UDID cannot be erased by a bulk erase command or any other user-accessible means. This feature allows for manufacturing traceability of Microchip Technology devices in applica- tions where this is a requirement. It may also be used by the application manufacturer for any number of things that may require unique identification, such as: • Tracking the device • Unique serial number • Unique security key The UDID comprises five 24-bit program words. When taken together, these fields form a unique 120-bit identifier. The UDID is stored in five read-only locations, located between 0x800F00 and 0x800F08 in the device Con- figuration space. Table 29-5 lists the addresses of the identifier words and shows their contents. Address Name Bit 15 14 13 12 11 10 9 876543210 FF0000h DEVID FAMID<7:0> DEV<7:0> FF0002h DEVREV — REV<3:0> Bit Field Register Description FAMID<7:0> DEVID Encodes the family ID of the device; FAMID = 0x75. DEV<7:0> DEVID Encodes the individual ID of the device. REV<3:0> DEVREV Encodes the sequential (numerical) revision identifier of the device. Device DEVID PIC24FJ64GA705 07 PIC24FJ128GA705 0B PIC24FJ256GA705 0F PIC24FJ64GA704 05 PIC24FJ128GA704 09 PIC24FJ256GA704 0D PIC24FJ64GA702 06 PIC24FJ128GA702 0A PIC24FJ256GA702 0E TABLE 29-5: UDID ADDRESSES UDID Address Description UDID1 0x800F00 UDID Word 1 UDID2 0x800F02 UDID Word 2 UDID3 0x800F04 UDID Word 3 UDID4 0x800F06 UDID Word 4 UDID5 0x800F08 UDID Word 5 |
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