DSPIC30F5015 datasheet(154/234 Pages) MICROCHIP

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dsPIC30F5015/5016

DS70149E-page 154

21.2

Oscillator Configurations

21.2.1

INITIAL CLOCK SOURCE

SELECTION

While coming out of Power-on Reset or Brown-out

Reset, the device selects its clock source based on:

• FOS<2:0> Configuration bits that select one of

four oscillator groups.

• AND FPR<4:0> Configuration bits that select one

of 16 oscillator choices within the primary group.

The selection is as shown in Table 21-2.

TABLE 21-2:

CONFIGURATION BIT VALUES FOR CLOCK SELECTION

Oscillator Mode

Oscillator

Source

FOS<2:0>

FPR<4:0>

OSC2 Function

ECIO w/PLL 4x

PLL

11101101

I/O

ECIO w/PLL 8x

PLL

11101110

I/O

ECIO w/PLL 16x

PLL

11101111

I/O

FRC w/PLL 4x

PLL

11100001

I/O

FRC w/PLL 8x

PLL

11101010

I/O

FRC w/PLL 16x

PLL

11100011

I/O

XT w/PLL 4x

PLL

11100101

OSC2

XT w/PLL 8x

PLL

11100110

OSC2

XT w/PLL 16x

PLL

11100111

OSC2

HS/2 w/PLL 4x

PLL

11110001

OSC2

HS/2 w/PLL 8x

PLL

11110010

OSC2

HS/2 w/PLL 16x

PLL

11110011

OSC2

HS/3 w/PLL 4x

PLL

11110101

OSC2

HS/3 w/PLL 8x

PLL

11110110

OSC2

HS/3 w/PLL 16x

PLL

11110111

OSC2

ECIO

External

01101100

I/O

External

01100100

OSC2

External

01100010

OSC2

External

01101011

CLKO

ERC

External

01101001

CLKO

ERCIO

External

01101000

I/O

XTL

External

01100000

OSC2

Secondary

000xxxxx

(Note 1, 2)

FRC

Internal FRC

001xxxxx

(Note 1, 2)

LPRC

Internal LPRC

010xxxxx

(Note 1, 2)

Note 1:

OSC2 pin function is determined by FPR<4:0>.

OSC1 pin cannot be used as an I/O pin even if the secondary oscillator or an internal clock source is

selected at all times.

DSPIC30F5015 Datasheet(PDF) 154 Page - Microchip Technology

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