Altera Cyclone IV Device Handbook page 405

Chapter 3: Cyclone IV Dynamic Reconfiguration
Dynamic Reconfiguration Controller Port List
Table 3–2. Dynamic Reconfiguration Controller Port List (ALTGX_RECONFIG Instance) (Part 4 of 7)
Input/
Port Name
Output
Analog Settings Control/Status Signals
tx_vodctrl[2..0]
Input
(1)
November 2011 Altera Corporation
This is an optional transmit buffer V
The number of settings varies based on the transmit buffer supply setting and the
termination resistor setting on the TX Analog screen of the ALTGX MegaWizard Plug-In
Manager.
The width of this signal is fixed to 3 bits if you enable either the Use
'logical_channel_address' port for Analog controls reconfiguration option or the Use
same control signal for all the channels option in the Analog controls screen. Otherwise,
the width of this signal is 3 bits per channel.
The following shows the V
OD
termination.
For more information, refer to the "Programmable Output Differential Voltage" section of
the Cyclone IV GX Device Datasheet
Corresponding ALTGX
tx_vodctrl[2:0]
3'b001
3'b010
3'b011
3'b111
3'b100
3'b101
All other values => N/A
Description
control signal. It is 3 bits per transmitter channel.
OD
values corresponding to the tx_vodctrl settings for 100-
chapter.
instance settings
1
2
3
(2)
4
5
6
3–7
Corresponding V
OD
settings (mV)
400
600
800
(2)
900
1000
1200
Cyclone IV Device Handbook,
Volume 2