EP4CE30F29C7N Datasheet, PDF (405/488 Pages) Altera Corporation – Cyclone IV Device Handbook, Volume 1

Chapter 3: Cyclone IV Dynamic Reconfiguration
3–7
Dynamic Reconfiguration Controller Port List
Table 3–2. Dynamic Reconfiguration Controller Port List (ALTGX_RECONFIG Instance) (Part 4 of 7)
Port Name
Input/
Output
Description
Analog Settings Control/Status Signals
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.
tx_vodctrl[2..0]
(1)
Input
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
instance settings
Corresponding V_OD
settings (mV)
3’b001
1
400
3’b010
2
600
3’b011
3
800
3’b111
4 ⁽²⁾
900 ⁽²⁾
3’b100
5
1000
3’b101
6
1200
All other values => N/A
November 2011 Altera Corporation
Cyclone IV Device Handbook,
Volume 2