Chapter 3: Cyclone IV Dynamic Reconfiguration
3–7
Dynamic Reconfiguration Controller Port List
November 2011
Altera Corporation
Analog Settings Control/Status Signals
tx_vodctrl[2..0]
Input
This is an optional transmit buffer V
OD
control signal. It is 3 bits per transmitter channel.
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
values corresponding to the
tx_vodctrl
settings for 100-
termination.
For more information, refer to the “Programmable Output Differential Voltage” section of
the
Cyclone IV GX Device Datasheet
chapter.
tx_vodctrl[2:0]
Corresponding ALTGX
Corresponding V
OD
instance settings
settings (mV)
3’b001
1
400
3’b010
2
600
3’b011
3
800
3’b111
4
900
3’b100
5
1000
3’b101
6
1200
All other values => N/A
Table 3–2. Dynamic Reconfiguration Controller Port List (ALTGX_RECONFIG Instance) (Part 4 of 7)
Port Name
Input/
Output
Description
Содержание Cyclone IV
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