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DS4830 User’s Guide
8
23.6.2 - Zero Flag ........................................................................................................................................................ 185
23.6.3 - Equals Flag ..................................................................................................................................................... 185
23.6.4 - Carry Flag ....................................................................................................................................................... 185
23.6.5 - Overflow Flag .................................................................................................................................................. 186
23.7 - Controlling Program Flow ...................................................................................................................................... 186
23.7.1 - Obtaining the next execution address ............................................................................................................ 186
23.7.2 - Unconditional jumps ....................................................................................................................................... 186
23.7.3 - Conditional jumps ........................................................................................................................................... 187
23.7.4 - Calling subroutines ......................................................................................................................................... 187
23.7.5 - Looping operations ......................................................................................................................................... 187
23.7.6 - Conditional returns.......................................................................................................................................... 188
23.8 - Handling Interrupts ................................................................................................................................................ 188
23.8.1 - Conditional return from interrupt ..................................................................................................................... 189
23.9 - Accessing the Stack .............................................................................................................................................. 189
23.10 - Accessing Data Memory ..................................................................................................................................... 190
SECTION 24
– INSTRUCTION SET................................................................................................................................... 192
SECTION 25
– UTILITY ROM ............................................................................................................................................ 220
25.1
– Overview ............................................................................................................................................................... 220
25.2
– In-Application Programming Functions ................................................................................................................ 221
25.2.1
– UROM_flashWrite .......................................................................................................................................... 221
25.2.2
– UROM_flashErasePage ................................................................................................................................ 221
25.3
– Data Transfer Functions ....................................................................................................................................... 222
25.3.1
– UROM_moveDP0 .......................................................................................................................................... 223
25.3.2
– UROM_moveDP0inc ..................................................................................................................................... 223
25.3.3
– UROM_moveDP0dec .................................................................................................................................... 223
25.3.4
– UROM_moveDP1 .......................................................................................................................................... 224
25.3.5
– UROM_moveDP1inc ..................................................................................................................................... 224
25.3.6
– UROM_moveDP1dec .................................................................................................................................... 224
25.3.7
– UROM_moveBP ............................................................................................................................................ 225
25.3.8
– UROM_moveBPinc ........................................................................................................................................ 225
25.3.9
– UROM_moveBPdec ...................................................................................................................................... 225
25.3.10
– UROM_copyBuffer ....................................................................................................................................... 226
25.4
– Utility ROM Examples ........................................................................................................................................... 227
25.4.1
– Reading Constant Word Data from Flash ...................................................................................................... 227
25.4.2
– Reading Constant Byte Data from Flash (Indirect Function Call) .................................................................. 227
