Servicing Notes - Sharp 28JF-76E Service Manual

1. Procedure to reprogram the flash memory (IC6003) contained in the digital module
Equipment needed
• A PC running MS Windows (Windows 98 Second Edition, Windows 2000 or Windows XP).
• A copy of the software "Tiny M2Flash" version 1.07 or higher.
• A PWB7359 (version N1 or higher) digital module including the Micronas SDA6000 microcontroller (also known
as M2) and the Fujitsu MBM29LV160/BE 1Mx16 bit Flash memory. Operation with other devices is not
guaranteed.
• A level-converter circuit to make the {+3.3 V, 0} voltages of the RS232 port at the digital module compatible with
the {+12 V, -12 V} voltages of the RS232 port at the PC. This circuit can be built around a MAX3222.
• A power supply to feed the digital module with 3.3 V.
• A RS232 cable for PC (PC-PC Type).
Hardware
Tiny M2Flash requires the M2 digital module to be connected as shown in Figure 18.
Figure 18: Block diagram showing the hardware
needed to use Tiny M2Flash.
In order to make the M2 start in the bootstrap loader mode (which is needed to work with Tiny M2Flash), pin 3 of connector
YB must be connected to ground at the moment of resetting the digital module (connecting the power to the module
makes it reset). It may also stay connected to ground during the whole programming process, if desired.
Software
The program is composed of two files: One ".exe" and one ".obj" file. The first one contains the MS Windows code that
runs in the PC. The second one contains the machine code that runs in the M2 microcontroller. The ".obj" file must be
moved/copied to "C:\" (there is where the program looks for it.) The program writes into the flash memory the information

SERVICING NOTES

Figure 19: Level Converter Schematic Diagram
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28JF-76E