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PIC24FJ128GA310 Datasheet(PDF) 249 Page - Microchip Technology |
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PIC24FJ128GA310 Datasheet(HTML) 249 Page - Microchip Technology |
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249 / 406 page  2010-2011 Microchip Technology Inc. DS39996F-page 249 PIC24FJ128GA310 FAMILY 19.0 DATA SIGNAL MODULATOR The Data Signal Modulator (DSM) allows the user to mix a digital 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 perform- ing 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: • Frequency Shift Keying (FSK) • Phase Shift Keying (PSK) • On-Off Keying (OOK) Figure 19-1 shows a simplified block diagram of the Data Signal Modulator peripheral. FIGURE 19-1: SIMPLIFIED BLOCK DIAGRAM OF THE DATA SIGNAL MODULATOR Note: This data sheet summarizes the features of this group of PIC24F devices. It is not intended to be a comprehensive reference source. For more information, refer to the “PIC24F Family Reference Manual” , Section 55. “Data Signal Modulator (DSM)” (DS39744). The information in this data sheet supersedes the information in the FRM. D Q MDBIT MDMIN SSP1 (SDO) SSP2 (SDO) UART1 (TX) UART2 (TX) UART3 (TX) UART4 (TX) VSS MDCIN1 MDCIN2 REFO Clock OC/PWM1 OC/PWM2 OC/PWM3 OC/PWM4 MDCH<3:0> MDMS<3:0> MDCL<3:0> OC/PWM1 OC/PWM2 SYNC CHPOL CLPOL D Q 1 0 SYNC 1 0 CHSYNC CLSYNC MDOUT MDOPOL MDOE CARH CARL EN MDEN Data Signal Modulator MOD OC/PWM5 OC/PWM6 OC/PWM7 VSS MDCIN1 MDCIN2 REFO Clock OC/PWM1 OC/PWM2 OC/PWM3 OC/PWM4 OC/PWM5 OC/PWM6 OC/PWM7 OC/PWM3 OC/PWM4 OC/PWM5 OC/PWM6 OC/PWM7 |
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