PIC24FJ64GA002-I/SO Microchip Technology Inc., PIC24FJ64GA002-I/SO Datasheet - Page 95

• Manufacturer Part Number: PIC24FJ64GA002-I/SO
• Description: MCU, 16-Bit, 28-Pin, 64KB Flash, 8KB RAM, 21 I/O, Nanowatt
• Manufacturer: Microchip Technology Inc.

Specifications of PIC24FJ64GA002-I/SO

• A/d Inputs: 10 Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 16 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 21
• Interface: I2C/SPI/UART
• Memory Capacity: 64 Kbytes
• Memory Type: Flash
• Number Of Bits: 16
• Number Of Inputs: 21
• Number Of Pins: 28
• Package Type: 28-pin SOIC
• Programmable Memory: 64K Bytes
• Ram Size: 8K Bytes
• Speed: 32 MHz
• Timers: 5-16-bit
• Voltage, Range: 2-3.6 V
• Voltage, Rating: 2-3.6 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

REGISTER 7-3:
7.4
With few limitations, applications are free to switch
between any of the four clock sources (POSC, SOSC,
FRC and LPRC) under software control and at any
time. To limit the possible side effects that could result
from this flexibility, PIC24F devices have a safeguard
lock built into the switching process.
© 2007 Microchip Technology Inc.
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-6
bit 5-0
Note:
U-0
U-0
—
—
Clock Switching Operation
The primary oscillator mode has three
different submodes (XT, HS and EC)
which are determined by the POSCMDx
Configuration bits. While an application
can switch to and from primary oscillator
mode in software, it cannot switch
between the different primary submodes
without reprogramming the device.
Unimplemented: Read as ‘0’
TUN5:TUN0: FRC Oscillator Tuning bits
011111 = Maximum frequency deviation
011110 =
•
•
•
000001 =
000000 = Center frequency, oscillator is running at factory calibrated frequency
111111 =
•
•
•
100001 =
100000 = Minimum frequency deviation
U-0
U-0
—
—
OSCTUN: FRC OSCILLATOR TUNE REGISTER
W = Writable bit
‘1’ = Bit is set
R/W-0
TUN5
U-0
—
R/W-0
TUN4
PIC24FJ64GA004 FAMILY
U-0
Preliminary
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
TUN3
7.4.1
To enable clock switching, the FCKSM1 Configuration
bit in Flash Configuration Word 2 must be programmed
to ‘0’. (Refer to Section 23.1 “Configuration Bits” for
further details.) If the FCKSM1 Configuration bit is
unprogrammed (‘1’), the clock switching function and
Fail-Safe Clock Monitor function are disabled. This is
the default setting.
The NOSCx control bits (OSCCON<10:8>) do not
control the clock selection when clock switching is dis-
abled. However, the COSCx bits (OSCCON<14:12>)
will reflect the clock source selected by the FNOSCx
Configuration bits.
The OSWEN control bit (OSCCON<0>) has no effect
when clock switching is disabled. It is held at ‘0’ at all
times.
U-0
—
ENABLING CLOCK SWITCHING
R/W-0
TUN2
U-0
—
x = Bit is unknown
R/W-0
TUN1
U-0
—
DS39881B-page 93
R/W-0
TUN0
U-0
—
bit 8
bit 0