S i 5 3 6 5 / 6 6 - E V B S i 5 3 6 7 / 6 8 - E V B S i 5 3 6 9 - E V B
Rev. 0.6
7
5.6. Power and 2L Signals
This evaluation board requires two power 3.3 V for the MCU and either 1.8, 2.5, or 3.3 V for the Any-
Frequency Precision Clock part. The power connector is J40. The grounds for the two supplies are tied together on
the EVB. There are sixteen LEDs, as described in Table 3. J14 is a three by 10 pin male header by which the user
can manually set the values of the two-level inputs using jumper plugs connected to either ground (silkscreen
labeled L) or the power supply (labeled H). J8 is a twenty pin ribbon header that brings out all of the status outputs
from the Si536x. Note that some pins are shared and serve as both inputs and outputs, depending on how the
device is configured. For users that wish to remotely access the input and output pins settings with external
hardware, J14 and J8 can be connected to ribbon cables.
5.7. 3L Pins
The three-level inputs can all be manually configured by installing jumper plugs at J17, either H or L. The M level is
achieved by not installing a jumper plug at a given location. J17 can also be used as a connection to an external
circuit that controls these pins. J22 is a ten pin ribbon header that is provided so that an external processor can
control the Si536x over either the SPI or I
2
C bus.
