DSPIC30F2010 MICROCHIP [Microchip Technology], DSPIC30F2010 Datasheet - Page 126

• Manufacturer Part Number: DSPIC30F2010
• Description: High-Performance, 16-Bit Digital Signal Controllers
• Manufacturer: MICROCHIP [Microchip Technology]

dsPIC30F2010
19.2
19.2.1
While coming out of Power-on Reset or Brown-out
Reset, the device selects its clock source based on:
a)
b)
The selection is as shown in Table 19-2.
TABLE 19-2:
DS70118G-page 124
EC
ECIO
EC w/ PLL 4x
EC w/ PLL 8x
EC w/ PLL 16x
ERC
ERCIO
XT
XT w/ PLL 4x
XT w/ PLL 8x
XT w/ PLL 16x
XTL
HS
LP
FRC
LPRC
Note 1:
Oscillator Mode
FOS<1:0> Configuration bits that select one of
four oscillator groups.
AND FPR<3:0> Configuration bits that select one
of 13 oscillator choices within the primary group.
2:
Oscillator Configurations
INITIAL CLOCK SOURCE
SELECTION
OSC2 pin function is determined by the Primary Oscillator mode selection (FPR<3:0>).
Note that 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.
CONFIGURATION BIT VALUES FOR CLOCK SELECTION
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Primary
Secondary
Internal FRC
Internal LPRC
Oscillator
Source
FOS1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
FOS0
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
19.2.2
In order to ensure that a crystal oscillator (or ceramic
resonator) has started and stabilized, an oscillator
start-up timer is included. It is a simple 10-bit counter
that counts 1024 T
oscillator clock to the rest of the system. The time-out
period is designated as T
every time the oscillator has to restart (i.e., on POR,
BOR and wake-up from Sleep). The oscillator start-up
timer is applied to the LP Oscillator, XT, XTL, and HS
modes (upon wake-up from Sleep, POR and BOR) for
the primary oscillator.
FPR3
—
—
—
1
1
1
1
1
1
1
0
0
0
0
0
0
FPR2
OSCILLATOR START-UP TIMER
(OST)
—
—
—
0
1
1
1
1
0
0
1
1
1
1
0
0
FPR1
OSC
—
—
—
1
0
0
1
1
0
0
0
0
1
1
0
1
© 2006 Microchip Technology Inc.
OST
cycles before releasing the
. The T
FPR0
—
—
—
1
0
1
0
1
1
0
0
1
0
1
X
X
OST
time is involved
(Notes 1, 2)
(Notes 1, 2)
(Notes 1, 2)
Function
OSC2
CLKO
CLKO
OSC2
OSC2
OSC2
OSC2
OSC2
OSC2
I/O
I/O
I/O
I/O
I/O