HC4GX15 Datasheet, PDF (472/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–14
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic
Table 2–2. Dynamic Reconfiguration Controller Port List (ALTGX_RECONFIG Instance) (Part 4 of 9)
Port Name
Input/
Output
Description
Analog Settings Control/Status Signals
tx_vodctrl[2..0] (1)
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.
For more information, refer to “Dynamically Reconfiguring PMA
Controls” on page 2–53.
The following shows the V_OD values corresponding to the
tx_vodctrl settings for 100-Ω termination.
For more information, refer to the Programmable Output
Differential Voltage section of the HardCopy IV GX Transceiver
Architecture chapter in volume 3 of the HardCopy IV Device
Handbook.
tx_vodctrl[2:0]
3’b000
V_OD (mV) for 1.4 V V_CCH
200
3’b001
400
3’b010
600
3’b011
700
3’b100
800
3’b101
900
3’b110
1000
3’b111
1200
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation