PIC24FJ64GA002-I/SP Microchip Technology Inc., PIC24FJ64GA002-I/SP Datasheet - Page 90
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PIC24FJ64GA002-I/SP
Manufacturer Part Number
PIC24FJ64GA002-I/SP
Description
MCU, 16-Bit, 28-Pin, 64KB Flash, 8KB RAM, 21 I/O, Nanowatt
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC24FJ64GA004-IPT.pdf
(256 pages)
Specifications of PIC24FJ64GA002-I/SP
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 SPDIP
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
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PIC24FJ64GA004 FAMILY
7.1
The system clock source can be provided by one of
four sources:
• Primary Oscillator (POSC) on the OSCI and
• Secondary Oscillator (SOSC) on the SOSCI and
• Fast Internal RC (FRC) Oscillator
• Low-Power Internal RC (LPRC) Oscillator
The primary oscillator and FRC sources have the
option of using the internal 4x PLL. The frequency of
the FRC clock source can optionally be reduced by the
programmable clock divider. The selected clock source
generates the processor and peripheral clock sources.
The processor clock source is divided by two to pro-
duce the internal instruction cycle clock, F
document, the instruction cycle clock is also denoted
by F
can be provided on the OSCO I/O pin for some
operating modes of the primary oscillator.
TABLE 7-1:
DS39881B-page 88
Fast RC Oscillator with Postscaler
(FRCDIV)
(Reserved)
Low-Power RC Oscillator (LPRC)
Secondary (Timer1) Oscillator
(SOSC)
Primary Oscillator (XT) with PLL
Module (XTPLL)
Primary Oscillator (EC) with PLL
Module (ECPLL)
Primary Oscillator (HS)
Primary Oscillator (XT)
Primary Oscillator (EC)
Fast RC Oscillator with PLL Module
(FRCPLL)
Fast RC Oscillator (FRC)
Note 1:
OSCO pins
SOSCO pins
OSC
2:
/2. The internal instruction cycle clock, F
CPU Clocking Scheme
Oscillator Mode
OSCO pin function is determined by the OSCIOFCN Configuration bit.
This is the default oscillator mode for an unprogrammed (erased) device.
CONFIGURATION BIT VALUES FOR CLOCK SELECTION
Oscillator Source
CY
Secondary
. In this
Internal
Internal
Primary
Primary
Primary
Primary
Primary
Internal
Internal
Internal
OSC
Preliminary
/2,
7.2
The oscillator source (and operating mode) that is
used at a device Power-on Reset event is selected
using Configuration bit settings. The oscillator Config-
uration bit settings are located in the Configuration
registers
Section 23.1
details). The Primary Oscillator Configuration bits,
POSCMD1:POSCMD0 (Configuration Word 2<1:0>),
and the Initial Oscillator Select Configuration bits,
FNOSC2:FNOSC0
select the oscillator source that is used at a Power-on
Reset. The FRC primary oscillator with postscaler
(FRCDIV) is the default (unprogrammed) selection.
The secondary oscillator, or one of the internal
oscillators, may be chosen by programming these bit
locations.
The Configuration bits allow users to choose between
the various clock modes, shown in Table 7-1.
7.2.1
The
Word 2<7:6>) are used to jointly configure device clock
switching and the Fail-Safe Clock Monitor (FSCM).
Clock switching is enabled only when FCKSM1 is
programmed (‘0’). The FSCM is enabled only when
FCKSM1:FCKSM0 are both programmed (‘00’).
POSCMD1:
POSCMD0
FCKSM
00
00
00
00
01
00
10
01
00
00
00
Oscillator Configuration
in
CLOCK SWITCHING MODE
CONFIGURATION BITS
“Configuration
the
Configuration
program
(Configuration Word 2<10:8>),
© 2007 Microchip Technology Inc.
FNOSC2:
FNOSC0
111
110
101
100
011
011
010
010
010
001
000
memory
bits
Bits”
(Configuration
for
(refer
Note
1, 2
further
1
1
1
1
1
to
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