PIC16F1847 datasheet(203/408 Pages) MICROCHIP

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 2011 Microchip Technology Inc.

Preliminary

DS41453B-page 203

PIC16(L)F1847

TABLE 23-1:

SUMMARY OF REGISTERS ASSOCIATED WITH DATA SIGNAL MODULATOR MODE

MDCARL: MODULATION LOW CARRIER CONTROL REGISTER

R/W-x/u

U-0

R/W-x/u

MDCLODIS

MDCLPOL

MDCLSYNC

—

MDCL<3:0>

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

u = Bit is unchanged

x = Bit is unknown

-n/n = Value at POR and BOR/Value at all other Resets

‘1’ = Bit is set

‘0’ = Bit is cleared

bit 7

MDCLODIS:

Modulator Low Carrier Output Disable bit

= Output signal driving the peripheral output pin (selected by MDCL<3:0> of the MDCARL register)

is disabled

= Output signal driving the peripheral output pin (selected by MDCL<3:0> of the MDCARL register)

is enabled

bit 6

MDCLPOL:

Modulator Low Carrier Polarity Select bit

= Selected low carrier signal is inverted

= Selected low carrier signal is not inverted

bit 5

MDCLSYNC:

Modulator Low Carrier Synchronization Enable bit

= Modulator waits for a falling edge on the low time carrier signal before allowing a switch to the high

time carrier

= Modulator Output is not synchronized to the low time carrier signal(1)

bit 4

Unimplemented:

Read as ‘0’

bit 3-0

MDCL<3:0>

Modulator Data High Carrier Selection bits (1)

1111

= Reserved. No channel connected.

•

1000

= Reserved. No channel connected.

0111

= CCP4 output (PWM Output mode only)

0110

= CCP3 output (PWM Output mode only)

0101

= CCP2 output (PWM Output mode only)

0100

= CCP1 output (PWM Output mode only)

0011

= Reference Clock module signal

0010

= MDCIN2 port pin

0001

= MDCIN1 port pin

0000

=VSS

Note 1:

Narrowed carrier pulse widths or spurs may occur in the signal stream if the carrier is not synchronized.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

on Page

MDCARH

MDCHODIS

MDCHPOL

MDCHSYNC

—

MDCH<3:0>

202

MDCARL

MDCLODIS

MDCLPOL

MDCLSYNC

—

MDCL<3:0>

203

MDCON

MDEN

MDOE

MDSLR

MDOPOL

MDOUT

—

MDBIT

200

MDSRC

MDMSODIS

—

MDMS<3:0>

201

Legend:

— = unimplemented, read as ‘0’. Shaded cells are not used in the Data Signal Modulator mode.

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