Information

dsPIC33F/PIC24H PROGRAMMING SPECIFICATION

Table 5-7 shows the ICSP programming details for

clearing the Configuration registers. In Step 1, the

Reset vector is exited. In Step 2, the write pointer (W7)

is loaded with 0x0000, which is the original destination

address (in TBLPAG, 0xF8 of program memory). In

Step 3, the NVMCON is set to program one

Configuration register. In Step 4, the TBLPAG register

is initialized to 0xF8 for writing to the Configuration

registers. In Step 5, the value to write to each

Configuration register is loaded to W0. In Step 6, the

Configuration register data is written to the write latch

using the TBLWTL instruction. In Steps 7 and 8, the

programming cycle is initiated. In Step 9, the internal

PC is set to 0x200 as a safety measure to prevent the

PC from incrementing into unimplemented memory.

Lastly, Steps 4-9 are repeated until all twelve

Configuration registers are written.