Programming An Em6540

 When a MFP is programmed, the programming box pulls the pin "test" high. At the end of the programation,
this pin returns low for 1s (figure 2). After that, the pin "test" is pulled high again during the read of the CRC.
On MFP with an internal RC Oscillator the
program starts when the pin "test" is 0. If the
circuit goes into sleep mode during the 1s test=0
period the programming box will not be able to
read the CRC value anymore. In this situation,
the CRC of the MFP will read "8F59" (figure 1).
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