DSPIC30F2012 Microchip Technology Inc., DSPIC30F2012 Datasheet - Page 124

• Manufacturer Part Number: DSPIC30F2012
• Description: Dspic30f2011/2012/3012/3013 High-performance Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

dsPIC30F2011/2012/3012/3013
17.2
17.2.1
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 17-2.
TABLE 17-2:
DS70139E-page 122
ECIO w/PLL 4x
ECIO wPLL 8x
ECIO w/ PLL 16x
FRC w/PLL 4X
FRC w/PLL 8x
FRC w/PLL 16x
XT wPLL 4x
XT w/PLL 8x
XT w/PLL 16x
HS2 w/PLL 4x
HS2 wPLL 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 the Primary Oscillator mode selection (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>
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
17.2.2
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
The T
to restart (i.e., on POR, BOR and wake-up from Sleep).
The Oscillator Start-up Timer is applied to the LP oscil-
lator, 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
OST
time is involved every time the oscillator has
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
© 2006 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
.
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
(Note 1, 2)
(Note 1, 2)
(Note 1, 2)
Function
OSC2
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