PIC24FJ256GB110-I/PT Microchip Technology, PIC24FJ256GB110-I/PT Datasheet - Page 129

• Manufacturer Part Number: PIC24FJ256GB110-I/PT
• Description: IC PIC MCU FLASH 256K 100TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 24Fr

Specifications of PIC24FJ256GB110-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 256KB (85.5K x 24)
• Package / Case: 100-TFQFP
• Core Processor: PIC
• Core Size: 16-Bit
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 83
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC24FJ
• Core: PIC
• Data Bus Width: 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C/SPI/UART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 84
• Number Of Timers: 5
• 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, PG164120, DM240001, DM240011
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 16-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 876-1004 - PIC24 BREAKOUT BOARDDM240011 - KIT STARTER MPLAB FOR PIC24F MCUMA240014 - MODULE PLUG-IN PIC24DM240001 - BOARD DEMO PIC24/DSPIC33/PIC32
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

8.5.1
When
PIC24FJ256GB110 family devices, users must always
observe these rules in configuring the system clock:
• For USB operation, the selected clock source
• The Primary Oscillator/PLL modes are the only
• While the FRCPLL Oscillator mode is available in
• All other oscillator modes are available; however,
 2009 Microchip Technology Inc.
(EC, HS or XT) must meet the USB clock
tolerance requirements.
oscillator configurations that permit USB opera-
tion. There is no provision to provide a separate
external clock source to the USB module.
these devices, it should never be used for USB
applications. FRCPLL mode is still available when
the application is not using the USB module. How-
ever, the user must always ensure that the FRC
source is configured to provide a frequency of
4 MHz or 8 MHz (RCDIV<2:0> = 001 or 000) and
that the USB PLL prescaler is configured
appropriately.
USB operation is not possible when these modes
are selected. They may still be useful in cases
where other power levels of operation are
desirable and the USB module is not needed
(e.g., the application is in Sleep and waiting for
bus attachment).
using
CONSIDERATIONS FOR USB
OPERATION
the
USB
On-The-Go
module
PIC24FJ256GB110 FAMILY
in
8.6
In addition to the CLKO output (F
certain oscillator modes, the device clock in the
PIC24FJ256GB110 family devices can also be config-
ured to provide a reference clock output signal to a port
pin. This feature is available in all oscillator configura-
tions and allows the user to select a greater range of
clock submultiples to drive external devices in the
application.
This reference clock output is controlled by the
REFOCON register (Register 8-4). Setting the ROEN
bit (REFOCON<15>) makes the clock signal available
on the REFO pin. The RODIV bits (REFOCON<11:8>)
enable the selection of 16 different clock divider
options.
The ROSSLP and ROSEL bits (REFOCON<13:12>)
control the availability of the reference output during
Sleep mode. The ROSEL bit determines if the oscillator
on OSC1 and OSC2, or the current system clock
source, is used for the reference clock output. The
ROSSLP bit determines if the reference source is
available on REFO when the device is in Sleep mode.
To use the reference clock output in Sleep mode, both
the ROSSLP and ROSEL bits must be set. The device
clock must also be configured for one of the primary
modes (EC, HS or XT); otherwise, if the POSCEN bit is
not also set, the oscillator on OSC1 and OSC2 will be
powered down when the device enters Sleep mode.
Clearing the ROSEL bit allows the reference output
frequency to change as the system clock changes
during any clock switches.
Reference Clock Output
OSC
DS39897C-page 129
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