PIC24FJ256GB206-I/MR Microchip Technology, PIC24FJ256GB206-I/MR Datasheet - Page 144
![MCU PIC 16BIT FLASH 256K 64VQFN](/photos/19/6/190652/4732178_sml.jpg)
PIC24FJ256GB206-I/MR
Manufacturer Part Number
PIC24FJ256GB206-I/MR
Description
MCU PIC 16BIT FLASH 256K 64VQFN
Manufacturer
Microchip Technology
Series
PIC® 24Fr
Specifications of PIC24FJ256GB206-I/MR
Core Size
16-Bit
Program Memory Size
256KB (85.5K x 24)
Core Processor
PIC
Speed
32MHz
Connectivity
I²C, IrDA, SPI, UART/USART, USB OTG
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
52
Program Memory Type
FLASH
Ram Size
96K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 3.6 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-VFQFN, Exposed Pad
Controller Family/series
PIC24
No. Of I/o's
52
Ram Memory Size
96KB
Cpu Speed
32MHz
No. Of Timers
5
No. Of Pwm Channels
9
Processor Series
PIC24FJ
Core
PIC
Data Bus Width
16 bit
Data Ram Size
96 KB
Interface Type
I2C, SPI, UART
Maximum Clock Frequency
32 MHz
Number Of Programmable I/os
29
Number Of Timers
5
Operating Supply Voltage
2.2 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52713-733, 52714-737, 53276-922, EWDSPIC
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, DM240001, MA240021
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 16 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
- Current page: 144 of 386
- Download datasheet (4Mb)
PIC24FJ256GB210 FAMILY
A recommended code sequence for a clock switch
includes the following:
1.
2.
3.
4.
5.
6.
7.
8.
The core sequence for unlocking the OSCCON register
and initiating a clock switch is shown in Example 8-1.
EXAMPLE 8-1:
DS39975A-page 144
;Place the new oscillator selection in W0
;OSCCONH (high byte) Unlock Sequence
MOV
MOV
MOV
MOV.b
MOV.b
;Set new oscillator selection
MOV.b
;OSCCONL (low byte) unlock sequence
MOV
MOV
MOV
MOV.b
MOV.b
;Start oscillator switch operation
BSET
Disable interrupts during the OSCCON register
unlock and write sequence.
Execute the unlock sequence for the OSCCON
high
OSCCON<15:8> in two back-to-back instructions.
Write new oscillator source to the NOSCx bits in
the instruction immediately following the unlock
sequence.
Execute the unlock sequence for the OSCCON
low
OSCCON<7:0> in two back-to-back instructions.
Set the OSWEN bit in the instruction immediately
following the unlock sequence.
Continue
clock-sensitive (optional).
Invoke an appropriate amount of software delay
(cycle counting) to allow the selected oscillator
and/or PLL to start and stabilize.
Check to see if OSWEN is ‘0’. If it is, the switch
was successful. If OSWEN is still set, then check
the LOCK bit to determine the cause of failure.
byte
byte
#OSCCONH, w1
#0x78, w2
#0x9A, w3
w2, [w1]
w3, [w1]
WREG, OSCCONH
#OSCCONL, w1
#0x46, w2
#0x57, w3
w2, [w1]
w3, [w1]
OSCCON,#0
to
by
by
execute
writing
writing
BASIC CODE SEQUENCE
FOR CLOCK SWITCHING
IN ASSEMBLY
code
46h
78h
and
and
that
9Ah
57h
is
not
to
to
operation and the system clock from the same oscillator
Configuration bit is not set. Note that the PLL96MHZ
8.5
The 96 MHz PLL block is implemented to generate the
stable 48 MHz clock required for full-speed USB
source. The 96 MHz PLL block is shown in Figure 8-2.
The 96 MHz PLL block requires a 4 MHz input signal; it
uses this to generate a 96 MHz signal from a fixed, 24x
PLL. This is, in turn, divided into two branches. The first
branch generates the USB clock and the second branch
generates the system clock. The 96 MHz PLL block can
be enabled and disabled using the PLL96MHZ Configu-
ration bit (Configuration Word<11>) or through the
PLLEN (CLKDIV<5>) control bit when the PLL96MHZ
Configuration bit and PLLEN register bit are available
only for PIC24F devices with USB.
The 96 MHz PLL prescaler does not automatically
sense the incoming oscillator frequency. The user must
manually configure the PLL divider to generate the
required 4 MHz output, using the PLLDIV<2:0> Config-
uration bits (Configuration Word 2<14:12> in most
devices).
96 MHz PLL Block
2010 Microchip Technology Inc.
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