Digilent 410-178P-KIT - Manual (Page 13)

Atlys Reference Manual
www.digilentinc.com page 13 of 22
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
The Atlys Base System Builder (BSB) support package automatically generates a test application for
the Ethernet MAC; this can be used as a reference for creating custom designs.
ISE designs can use the IP Core Generator wizard to create a tri-mode Ethernet MAC controller IP
core.
Video Input and Output (HDMI Ports)
The Atlys board contains four HDMI ports, including two buffered HDMI input/output ports, one
buffered HDMI output port, and one unbuffered port that can be input or output (generally used as
an output port.) The three buffered ports use HDMI type A connectors, and the unbuffered port uses a
type D connector loaded on the bottom side of the PCB immediately under the Pmod connector (the
type D connector is much smaller than the type A). The data signals on the unbuffered port are
shared with a Pmod connector. This limits signal bandwidth somewhat
– the shared connector may
not be able to produce or receive the highest frequency video signals, particularly with longer HDMI
cables.
Since the HDMI and DVI systems use the same TMDS signaling standard, a simple adaptor (available
at most electronics stores) can be used to drive a DVI connector from either of the HDMI output ports.
The HDMI connector does not include VGA signals, so analog displays cannot be driven.
The 19-pin HDMI connectors include four differential data channels, five GND connections, a one-wire
Consumer Electronics Control (CEC) bus, a two-wire Display Data Channel (DDC) bus that is
essentially an I2C bus, a Hot Plug Detect (HPD) signal, a 5V signal capable of delivering up to 50mA,
and one reserved (RES) pin. Of these, only the differential data channels and I2C bus are connected
to the FPGA. All signal connections are shown in the table below.
See Table
Spartan-6
8
8
HDMI Buffer
TI TMDS141
J1: Type A
HDMI IN
8
J3: Type A
HDMI IN
8
HDMI Buffer
TI TMDS141
J2: Type A
HDMI OUT
JA: Type D
HDMI Unbuffered,
shared with Pmod
HDMI Buffer
TI TMDS141
See Table
See Table
See Table
SCL: C13
SDA: A13
TX-SDA: C9
TX-SCL: D9
RX-SDA: M18
RX-SCL: M16
JP6, JP7
JP2
RXB:
JA:
TX:
RX: