Microchip Technology MA240029 データシート

 2010-2011 Microchip Technology Inc.

DS39996F-page 249

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)

 shows a simplified block diagram of the

Data Signal Modulator peripheral.

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”

,

 (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)

V

SS

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

V

SS

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