Microchip Technology AC244049 Data Sheet

PIC16(L)F1825/1829

DS41440C-page 210

 2010-2012 Microchip Technology Inc.

REGISTER 23-3:

MDCARH: MODULATION HIGH CARRIER CONTROL REGISTER

R/W-x/u

U-0

R/W-x/u

MDCHODIS

MDCHPOL MDCHSYNC

—

MDCH<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

MDCHODIS:

Modulator High Carrier Output Disable bit

1 = Output signal driving the peripheral output pin (selected by MDCH<3:0>) is disabled
0 = Output signal driving the peripheral output pin (selected by MDCH<3:0>) is enabled

bit 6

MDCHPOL:

Modulator High Carrier Polarity Select bit

1 = Selected high carrier signal is inverted
0 = Selected high carrier signal is not inverted

bit 5

MDCHSYNC:

Modulator High Carrier Synchronization Enable bit

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

low time carrier

0 = Modulator Output is not synchronized to the high time carrier signal

(1)

bit 4

Unimplemented:

Read as ‘0’

bit 3-0

MDCH<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 (CLKR)
0010 = MDCIN2 port pin
0001 = MDCIN1 port pin
0000 = V

Note 1:

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