User guide

DS4830A User’s Guide
9
23.7.2 – Unconditional Jumps ..................................................................................................................................... 197
23.7.3 – Conditional Jumps ......................................................................................................................................... 198
23.7.4 – Calling Subroutines ........................................................................................................................................ 198
23.7.5 – Looping Operations........................................................................................................................................ 198
23.7.6 – Conditional Returns ....................................................................................................................................... 199
23.8 – Handling Interrupts ............................................................................................................................................... 199
23.8.1 – Conditional Return from Interrupt .................................................................................................................. 200
23.9 – Accessing the Stack ............................................................................................................................................. 200
23.10 – Accessing Data Memory .................................................................................................................................... 201
SECTION 24 – INSTRUCTION SET .................................................................................................................................. 203
SECTION 25 – UTILITY ROM ............................................................................................................................................ 231
25.1 – Overview ............................................................................................................................................................... 231
25.2 – In-Application Programming Functions ................................................................................................................ 232
25.2.1 – UROM_flashWrite .......................................................................................................................................... 232
25.2.2 – UROM_flashErasePage ................................................................................................................................ 232
25.3 – Data Transfer Functions ....................................................................................................................................... 233
25.3.1 – UROM_moveDP0 .......................................................................................................................................... 233
25.3.2 – UROM_moveDP0inc...................................................................................................................................... 233
25.3.3 – UROM_moveDP0dec .................................................................................................................................... 234
25.3.4 – UROM_moveDP1 .......................................................................................................................................... 234
25.3.5 – UROM_moveDP1inc...................................................................................................................................... 234
25.3.6 – UROM_moveDP1dec .................................................................................................................................... 235
25.3.7 – UROM_moveBP ............................................................................................................................................ 235
25.3.8 – UROM_moveBPinc ........................................................................................................................................ 235
25.3.9 – UROM_moveBPdec....................................................................................................................................... 236
25.3.10 – UROM_copyBuffer ....................................................................................................................................... 236
25.4 Special Functions .................................................................................................................................................... 237
25.4. 1 – UROM_copyWord ......................................................................................................................................... 237
25.4. 2 – Software Reset ............................................................................................................................................. 237
25.5 – Utility ROM Examples ........................................................................................................................................... 238
25.5.1 – Reading Constant Word Data from Flash ...................................................................................................... 238
25.5.2 – Reading Constant Byte Data from Flash (Indirect Function Call) .................................................................. 238
SECTION 26 – MISCELLANEOUS .................................................................................................................................... 239
26.1 – Overview ............................................................................................................................................................... 239
26.2 – CRC8 .................................................................................................................................................................... 239
26.2.1 – CRC Data In (CRC8IN) .................................................................................................................................. 239
26.2.2 – CRC Data Out (CRC8OUT) ........................................................................................................................... 239
26.2.3 – Example ......................................................................................................................................................... 239
26.3 – Software Interrupts ............................................................................................................................................... 239
26.3.1 – User Interrupt Register (USER_INT) ............................................................................................................. 240
26.4 – General-Purpose Registers .................................................................................................................................. 240
26.4.1 – General-Purpose Register ............................................................................................................................. 240