PIC24FJ256DA210 Datasheet, PDF(152/408 Page) Microchip Technology – 64/100-Pin, 16-Bit Flash Microcontrollers with Graphics Controller and USB On-The-Go (OTG)

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PIC24FJ256DA210 Datasheet, PDF (152/408 Pages) Microchip Technology – 64/100-Pin, 16-Bit Flash Microcontrollers with Graphics Controller and USB On-The-Go (OTG)

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PIC24FJ256DA210 FAMILY

TABLE 8-4: DISPLAY MODULE CLOCK FREQUENCY DIVISION

GCLKDIV<6:0>

Frequency Divisor

Display Module Clock Frequency

96 MHz Input (48 MHz Input)

0000000

0000001

0000010

â¦

0111111

1000000

1000001

1000010

â¦

1011111

1100000

1100001

1100010

â¦

1111110

1111111

1

1.25 (start incrementing by 0.25)

1.5

â¦

16.75

17

17.5 (start incrementing by 0.5)

18

â¦

32.5

33

34 (start incrementing by 1)

35

â¦

63

64

96 MHz (48 MHz)

76.80 MHz (38.4 MHz)

64 MHz (32 MHz)

â¦

5.73 MHz (2.86 MHz)

5.65 MHz (2.82 MHz)

5.49 MHz (2.74 MHz)

5.33 MHz (2.66 MHz)

â¦

2.95 MHz (1.47 MHz)

2.91 MHz (1.45 MHz)

2.82 MHz (1.41 MHz)

2.74 MHz (1.37 MHz)

â¦

1.52 MHz (762 kHz)

1.50 MHz (750 kHz)

8.6 Reference Clock Output

In addition to the CLKO output (FOSC/2) available in

certain oscillator modes, the device clock in the

PIC24FJ256DA210 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 8-5). 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 OSCI and OSCO, 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 OSCI and OSCO 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.

DS39969B-page 152

ï£ 2010 Microchip Technology Inc.

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