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PCD
write_eeprom(0x0,0x12);
value=read_eeprom(0x0);
//writes 0x12 to data eeprom location 0
//reads data eeprom location 0x0 returns 0x12
#ROM 0x007FFC00={1,2,3,4,5} // Inserts this data into the hex file
// The data EEPROM address differs between PICs
// Please refer to the device editor for device specific values.
write_eeprom(0x10, 0x1337);
value=read_eeprom(0x0);
// Writes 0x1337 to data EEPROM location 10.
// Reads data EEPROM location 10 returns 0x1337.
Data Signal Modulator
The Data Signal Modulator (DSM) allows the user to mix a digit al data stream (the “modulator
signal”) with a carrier signal to produce a modulated output. Both the carrier and the modulator
signals are supplied to the DSM module, either internally from the output of a peripheral, or
externally through an input pin. The modulated output signal is generated by performing a
logical AND operation of both the carrier and modulator signals and then it is provided to the
MDOUT pin. Using this method, the DSM can generate the following types of key modulation
schemes:
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?
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Frequency Shift Keying (FSK)
Phase Shift Keying (PSK)
On-Off Keying (OOK)
Relevant Functions:
(8 bit or 16 bit depending on the
device)
setup_dsm(mode,source,carrier) Configures the DSM module and selects the source signal and
carrier signals.
setup_dsm(TRUE)
setup_dsm(FALSE)
Enables the DSM module.
Disables the DSM module.
Relevant Preprocessor:
None
Relevant Interrupts:
None
Relevant Include Files:
None, all functions built-in
Relevant getenv() parameters: None
40
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