Key Components Description and Operation
UG0617 User Guide Revision 4.0
22
Figure 15 •
50 MHz and 100 MHz Clock Oscillators
A 100 MHz LVDS clock oscillator operating at 3.3 V with an accuracy of ±50 ppm is available on the
board, as shown in the previous figure and listed in the following table. This clock oscillator is connected
to the FPGA fabric AB37 and AB36 pins.
Note:
Both clock sources drive the same CCC_NE0. To use both clock sources at a time and avoid a compile
error, configure one CCC pin as fabric input and use regular routing resources for the clock signal.
For more information, see the Board Level Schematics document (provided separately).
4.10
User Interface
The RTG4 Development Board has user LEDs as well as push-button switches.
4.10.1
User LEDs
The board has eight-active high LEDs connected to the RTG4 device that can be used to debug
applications. The following table lists the on-board user LEDs.
Table 11 •
100 MHz Clock
RTG4 Development Kit Pin RTG4 Package Pin Number
RTG4 Device Pin Name
OSC_100MHZ_P_B1
AB37
MSIOD74PB1/GB12_23/CCC_NE0_CLKI3
OSC_100MHZ_N_B1
AB36
MSIOD74NB1
Table 12 •
LEDs
RTG4 Development Kit Pin RTG4 Package Pin Number
RTG4 Device Pin Name
LED1
W35
MSIOD62PB1
LED2
W34
MSIOD46PB1
LED3
V30
MSIOD47PB1
LED4
W33
MSIOD46NB1
50 MHz
Oscillator
GND
TRISTATE
VDD
OUT
2.5 V
50MHZ_B1
3.3 V
100 MHz
Diff Clock Source
RTG4
AB37
AB36
AA39
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