PIC16F1503-IST 查看數據表（PDF） - Microchip Technology

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PIC16F1503-IST

14-Pin Flash, 8-Bit Microcontrollers

Microchip Technology 

FIGURE 24-1:

NUMERICALLY CONTROLLED OSCILLATOR (NCOx) MODULE SIMPLIFIED BLOCK DIAGRAM

NCOxINCH NCOxINCL

16

(1)

INCBUFH INCBUFL

16

20

Rev. 10-000028A

7/30/2013

HFINTOSC 00

FOSC 01

LCx_out 10

NCO1CLK

11

NxCKS<1:0> 2

NCOx_clk

NCO_overflow

Adder

20

NCOxACCU NCOxACCH NCOxACCL

20

Fixed Duty

Cycle Mode

Circuitry

DQ

NCO_interrupt

DQ

_

Q

EN

Ripple

Counter

R

3

NxPWS<2:0>

SQ

_

RQ

Pulse

Frequency

Mode Circuitry

0

1

NxPFM NxPOL

NxOE

set bit

NCOxIF

TRIS bit

NCOx

NCOx_out

To Peripherals

DQ

Q1

NxOUT

Note 1: The increment registers are double-buffered to allow for value changes to be made without first disabling the NCO module. The full increment value is loaded into the buffer registers on the

second rising edge of the NCOx_clk signal that occurs immediately after a write to NCOxINCL register. The buffers are not user-accessible and are shown here for reference.

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