Maxim Integrated MAXQ Family Users Guide: MAXQ2010 Supplement - Manual (Page 135)

MAXQ Family User’s Guide:
MAXQ2010 Supplement
24-1
SECTION 24: UTILITY ROM (SPECIFIC TO MAXQ2010)
24.1 Overview
The MAXQ2010 utility ROM includes routines that provide the following functions to application software:
• In-application programming routines for flash memory (program, erase, mass erase)
• Single word/byte copy and buffer copy routines for use with lookup tables
• Entry into stop mode
To provide backwards compatibility among different versions of the utility ROM, a function address table is included
that contains the entry points for all user-callable functions. With this table, user code can determine the entry point
for a given function as follows:
1. Read the location of the function address table from address 0800Dh in the utility ROM.
2. The entry points for each function listed below are contained in the function address table, one word per function,
in the order given by their function numbers.
For example, the entry point for the UROM_flashEraseAll function can be determined by the following procedure.
1. functionTable = dataMemory[0800Dh]
2. flashWriteEntry = dataMemory[functionTable + 2]
It is also possible to call utility ROM functions directly, using the entry points given above. Standard include files are
provided for this purpose with the MAXQ development toolset; also see Appendix 1. This method calls functions more
quickly, but the application may need to be recompiled in order to run properly with a different version of the utility
ROM.
Table 24-1. Functions for MAXQ2010 Utility ROM Version 1.00
INDEX FUNCTION NAME ENTRY POINT SUMMARY
0 UROM_flashWrite 83CEh Programs a single word of flash memory.
1 UROM_flashErasePage 83F1h Erases (programs to FFFFh) a 512-word sector of flash memory.
2 UROM_flashEraseAll 8407h Erases (programs to FFFFh) all flash memory.
3 UROM_moveDP0 8416h Reads a byte/word at DP[0].
4 UROM_moveDP0inc 8419h Reads a byte/word at DP[0], then increments DP[0].
5 UROM_moveDP0dec 841Ch Reads a byte/word at DP[0], then decrements DP[0].
6 UROM_moveDP1 841Fh Reads a byte/word at DP[1].
7 UROM_moveDP1inc 8422h Reads a byte/word at DP[1], then increments DP[0].
8 UROM_moveDP1dec 8425h Reads a byte/word at DP[1], then decrements DP[0].
9 UROM_moveBP 8428h Reads a byte/word at BP[OFFS].
10 UROM_moveBPinc 842Bh Reads a byte/word at BP[OFFS], then increments OFFS.
11 UROM_moveBPdec 842Eh Reads a byte/word at BP[OFFS], then decrements OFFS.
12 UROM_copyBuffer 8431h Copies LC[0] values (up to 255) from DP[0] to BP[OFFS].
13 UROM_stopMode 8437h Enters stop mode.