DSPIC30F3011 Microchip Technology Inc., DSPIC30F3011 Datasheet - Page 140

• Manufacturer Part Number: DSPIC30F3011
• Description: Dspic30f3010/3011 Enhanced Flash 16-bit Digital Signal Controller
• Manufacturer: Microchip Technology Inc.

dsPIC30F3010/3011
20.2
20.2.1
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 20-2.
TABLE 20-2:
DS70141D-page 138
ECIO w/PLL 4x
ECIO w/PLL 8x
ECIO w/PLL 16x
FRC w/PLL 4X
FRC w/PLL 8x
FRC w/PLL 16x
XT w/PLL 4x
XT w/PLL 8x
XT w/PLL 16x
HS2 w/PLL 4x
HS2 w/PLL 8x
HS2 w/PLL 16x
HS3 w/PLL 4x
HS3 w/PLL 8x
HS3 w/PLL 16x
ECIO
XT
HS
EC
ERC
ERCIO
XTL
LP
FRC
LPRC
Note 1:
FOS<2:0> Configuration bits that select one of
four oscillator groups,
and FPR<4:0> Configuration bits that select one
of 15 oscillator choices within the primary group.
Oscillator Mode
2:
Oscillator Configurations
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.
INITIAL CLOCK SOURCE
SELECTION
CONFIGURATION BIT VALUES FOR CLOCK SELECTION
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
PLL
External
External
External
External
External
External
External
Secondary
Internal FRC
Internal LPRC
Oscillator
Source
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
FOS<2:0>
Confidential
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
20.2.2
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.
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
X
X
X
1
1
1
0
1
0
0
0
0
0
0
0
0
0
0
1
0
0
1
1
1
0
X
X
X
OSCILLATOR START-UP TIMER
(OST)
FPR<4:0>
1
1
1
0
0
0
1
1
1
0
0
0
1
1
1
1
1
0
0
0
0
0
X
X
X
OSC
© 2007 Microchip Technology Inc.
OST
cycles before releasing the
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
0
1
1
0
0
0
X
X
X
. The T
1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
0
0
0
1
1
0
0
X
X
X
OST
OSC2 Function
time is involved
(Note 1, 2)
(Note 1, 2)
(Note 1, 2)
OSC2
OSC2
OSC2
OSC2
OSC2
OSC2
OSC2
OSC2
OSC2
OSC2
OSC2
CLKO
CLKO
OSC2
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O