Datasheet

Table Of Contents
2011-2013 Microchip Technology Inc. DS40001609C-page 291
PIC16(L)F1508/9
25.9 Register Definitions: NCOx Control Registers
REGISTER 25-2: NCOxCLK: NCOx INPUT CLOCK CONTROL REGISTER
REGISTER 25-1: NCOxCON: NCOx CONTROL REGISTER
R/W-0/0 R/W-0/0 R-0/0 R/W-0/0 U-0 U-0 U-0 R/W-0/0
NxEN NxOE NxOUT NxPOL
—NxPFM
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 NxEN: NCOx Enable bit
1 = NCOx module is enabled
0 = NCOx module is disabled
bit 6 NxOE: NCOx Output Enable bit
1 = NCOx output pin is enabled
0 = NCOx output pin is disabled
bit 5 NxOUT: NCOx Output bit
1 = NCOx output is high
0 = NCOx output is low
bit 4 NxPOL: NCOx Polarity bit
1 = NCOx output signal is active low (inverted)
0 = NCOx output signal is active high (non-inverted)
bit 3-1 Unimplemented: Read as0
bit 0 NxPFM: NCOx Pulse Frequency Mode bit
1 = NCOx operates in Pulse Frequency mode
0 = NCOx operates in Fixed Duty Cycle mode
R/W-0/0 R/W-0/0 R/W-0/0 U-0 U-0 U-0 R/W-0/0 R/W-0/0
NxPWS<2:0>
(1, 2)
NxCKS<1:0>
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 7-5 NxPWS<2:0>: NCOx Output Pulse Width Select bits
(1, 2)
111 = 128 NCOx clock periods
110 = 64 NCOx clock periods
101 = 32 NCOx clock periods
100 = 16 NCOx clock periods
011 = 8 NCOx clock periods
010 = 4 NCOx clock periods
001 = 2 NCOx clock periods
000 = 1 NCOx clock periods
bit 4-2 Unimplemented: Read as 0
bit 1-0 NxCKS<1:0>: NCOx Clock Source Select bits
11 = NCO1CLK pin
10 = LC1_out
01 = F
OSC
00 = HFINTOSC (16 MHz)
Note 1: NxPWS applies only when operating in Pulse Frequency mode.
2: If NCOx pulse width is greater than NCO_overflow period, operation is undeterminate.