SP16160CH1RB Reference Design Board User’s Guide
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www.national.com
programmed with a PC using National Semiconductor’s
CodeLoader software. The serial programming
interface can also be programmed over the USB port of
the PC. To program the LMK04031B through the USB
port, a separate interface board is available from
National Semiconductor.
See
http://www.national.com/appinfo/interface/clk_condition
ers.html
to download CodeLoader, obtain a user’s
guide and to order any necessary hardware such as
programming cables or USB interface boards.
Remove JP1 if using CodeLoader to program the
LMK04031B.
The procedure for programming the LMK04031B
through National’s CodeLoader software and special
parallel port cable is described here if the user intends
to program the SP16160CH1RB reference board for
sampling rates other than 153.6 MSPS. Please note
that the achievable sample rates are limited by the
61.44 MHz reference crystal oscillator and the 76.8
MHz VCXO if they are used. Hardware changes are
also necessary to modify the clock path from the
standard 153.6 MHz path. Some output frequencies
may also require loop filter changes for optimal jitter
performance. In the default hardware configuration,
153.6 MHz is the only possible clock frequency due to
the narrowband SAW filter in the clock path.
Figure 17 through Figure 25 illustrate each CodeLoader
configuration screen and its contents used to properly
program the LMK04031B Clock Conditioner through
either a parallel port or USB PC interface and
appropriate cable. These configuration screens are for
programming the LMK04031B to output 153.6 MHz at
CLKout2, which is the same output produced by using
the PIC-module included in this evaluation kit.
Before programming the device, it is important that the
LMK04031B go through a proper reset cycle. Check
and then uncheck the RESET checkbox in the
Bits/Pins
tab in Figure 18 to accomplish the reset. Then
configure the CodeLoader software according to the
following figures and select
Load Device
from the
Keyboard Controls
file menu to program the device.
Figure 15: LMK04031B CodeLoader software communication port setup for programming
The user may be required to select a different LPT port that is compatible with the capabilities of the
PC being used to program the device. Using the USB port requires a separate interface board,
available from National Semiconductor.
Содержание ADC16DV160
Страница 23: ...SP16160CH1RB Reference Design Board User s Guide 23 www national com 11 0 Layout Figure 27 Layer 1 Signal...
Страница 24: ...SP16160CH1RB Reference Design Board User s Guide 24 www national com Figure 28 Layer 2 Ground...
Страница 25: ...SP16160CH1RB Reference Design Board User s Guide 25 www national com Figure 29 Layer 3 Ground...
Страница 26: ...SP16160CH1RB Reference Design Board User s Guide 26 www national com Figure 30 Layer 4 Power...
Страница 27: ...SP16160CH1RB Reference Design Board User s Guide 27 www national com Figure 31 Layer 5 Ground...
Страница 28: ...SP16160CH1RB Reference Design Board User s Guide 28 www national com Figure 32 Layer 6 Signal...
