TMS320F2810, TMS320F2812
DIGITAL SIGNAL PROCESSORS
SPRS174B 鈥?APRIL 2001 鈥?REVISED SEPTEMBER 2001
PLL-based clock module
The F2810 and F2812 have an on-chip, PLL-based clock module. This module provides all the necessary
clocking signals for the device, as well as control for low-power mode entry. The PLL has a 4-bit ratio control
to select different CPU clock rates.
The PLL-based clock module provides two modes of operation:
D
Crystal-operation
This mode allows the use of an external crystal/resonator to provide the time base to the device.
D
External clock source operation
This mode allows the internal oscillator to be bypassed. The device clocks are generated from an external
clock source input on the XTAL1/CLKIN pin. In this case, an external oscillator clock is connected to the
XTAL1/CLKIN pin.
external reference oscillator clock option
TI recommends that customers have the resonator/crystal vendor characterize the operation of their device with
the DSP chip. The resonator/crystal vendor has the equipment and expertise to tune the tank circuit. The vendor
can also advise the customer regarding the proper tank component values that will ensure start-up and stability
over the entire operating range.
PRODUCT PREVIEW
50
POST OFFICE BOX 1443
鈥?/div>
HOUSTON, TEXAS 77251鈥?443
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