A51 MACRO ASSEMBLER  STARTUP34                                                            09/13/2005 18:00:20 PAGE     1


MACRO ASSEMBLER A51 V7.10b
OBJECT MODULE PLACED IN STARTUP34.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE STARTUP34.A51 SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     $nomod51 
                       2     
                       3     ;------------------------------------------------------------------------------
                       4     ;  startup34.a51
                       5     ;
                       6     ;  Version:
                       7     ;  September 13, 2005 Ver 1.1 - Updated disclaimer.
                       8     ;  February 18, 2005 Ver 1.0 - Initial release.
                       9     ;
                      10     ;  Dependencies:
                      11     ;  uPSD_5V and FREQ_OSC are used as input parameters to set up the BUSCON 
                      12     ;  register appropriately for proper uPSD3400 operation.  They are set in the
                      13     ;  header file, upsd3400_hardware.h, for the target processor.
                      14     ;
                      15     ;  Description:
                      16     ;  This code is executed after a reset.  Besides the usual C51 startup 
                      17     ;  settings, specific uPSD3400 initializations are done here such as the
                      18     ;  BUSCON register.  Other uPSD3400 initializations can be added here.  When
                      19     ;  the startup code execution is complete, this code jumps to ?C_START that 
                      20     ;  is typically the main() function in the C code.
                      21     ;  
                      22     ;
                      23     ;  Copyright (c) 2005 STMicroelectronics Inc.
                      24     ;
                      25     ;
                      26     ;  THIS INFORMATION (or THIS SOFTWARE or THIS DOCUMENT) IS FOR GUIDANCE ONLY. ST 
                      27     ;  MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS 
                      28     ;  SOFTWARE nor for any infringement of patents or other rights of third parties 
                      29     ;  which may result from its use. ST MICROELECTRONICS SHALL NOT BE HELD LIABLE FOR 
                      30     ;  ANY DIRECT, INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY 
                      31     ;  CLAIMS ARISING IN CONNECTION WITH OR ARISING FROM THE FURNISHING, PERFORMANCE, 
                      32     ;  OR USE OF THIS SOFTWARE. Specifications mentioned in this publication are 
                      33     ;  subject to change without notice. This publication supersedes and replaces all 
                      34     ;  information previously supplied. STMicroelectronics products are not authorized 
                      35     ;  for use as critical components in life support devices or systems without the 
                      36     ;  express written approval of STMicroelectronics.
                      37     ;------------------------------------------------------------------------------
                      38     
                      39     ;#include "upsd3400_hardware.h"
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A51 MACRO ASSEMBLER  STARTUP34                                                            09/13/2005 18:00:20 PAGE     2

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A51 MACRO ASSEMBLER  STARTUP34                                                            09/13/2005 18:00:20 PAGE     4

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                     199     
                     200     
                     201     ;  User-defined Power-On Initialization of Memory (Clear Memory)
                     202     ;
                     203     ;  With the following EQU statements the initialization of memory
                     204     ;  at processor reset can be defined:
                     205     
                     206     ;               ; the absolute start-address of IDATA memory is always 0
  0100               207     IDATALEN        EQU     100H    ; the length of IDATA memory in bytes.
                     208     
                     209     ; NOTE: The length equates for XDATALEN and PDATALEN should be changed to 
                     210     ;       non-zero values indicating the amount of XDATA and/or PDATA
                     211     ;       memory to be initialized to 0x00.  The start address equates 
                     212     ;       (XDATASTART and PDATASTART) must be set to the respective starting
                     213     ;       addresses as mapped in PSDsoft if the memory is to be initialized.
                     214     
  0000               215     XDATASTART      EQU     0H      ; the absolute start-address of XDATA memory
  0000               216     XDATALEN        EQU     0H      ; the length of XDATA memory in bytes.
                     217     
  0000               218     PDATASTART      EQU     0H      ; the absolute start-address of PDATA memory
  0000               219     PDATALEN        EQU     0H      ; the length of PDATA memory in bytes.
                     220     
                     221     ;  Notes:  The IDATA space overlaps physically the DATA and BIT areas of the
                     222     ;          8051 CPU. At minimum the memory space occupied from the C51 
                     223     ;          run-time routines must be set to zero.
                     224     
                     225     
                     226     ;------------------------------------------------------------------------------