PIC24FJ128GA310-I Datasheet, PDF (249/406 Pages) Microchip Technology – 64/80/100-Pin, General Purpose, 16-Bit Flash Microcontrollers with LCD Controller and nanoWatt XLP Technology

PIC24FJ128GA310 FAMILY
19.0 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.
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:
MDCH<3:0>
VSS
MDCIN1
MDCIN2
REFO Clock
OC/PWM1
OC/PWM2
OC/PWM3
OC/PWM4
OC/PWM5
OC/PWM6
OC/PWM7
MDMS<3:0>
MDBIT
MDMIN
SSP1 (SDO)
SSP2 (SDO)
UART1 (TX)
UART2 (TX)
UART3 (TX)
UART4 (TX)
OC/PWM1
OC/PWM2
OC/PWM3
OC/PWM4
OC/PWM5
OC/PWM6
OC/PWM7
MDCL<3:0>
VSS
MDCIN1
MDCIN2
REFO Clock
OC/PWM1
OC/PWM2
OC/PWM3
OC/PWM4
OC/PWM5
OC/PWM6
OC/PWM7
SIMPLIFIED BLOCK DIAGRAM OF THE DATA SIGNAL MODULATOR
CARH
MDEN
EN
Data Signal
Modulator
CHPOL
D
SYNC
Q
1
MOD
0
CHSYNC
MDOE
MDOPOL
MDOUT
CARL
CLPOL
D
SYNC
Q1
0
CLSYNC
 2010-2011 Microchip Technology Inc.
DS39996F-page 249