Altera Cyclone IV - Method 2: Writing the same Control Signals to Control All the Transceiver Channels

3–16 Chapter 3: Cyclone IV Dynamic Reconfiguration
Dynamic Reconfiguration Modes
Cyclone IV Device Handbook, November 2011 Altera Corporation
Volume 2
Figure 3–5 shows the read transaction waveform for Method 1.
1 Simultaneous write and read transactions are not allowed.
Method 2: Writing the Same Control Signals to Control All the Transceiver
Channels
This method does not require the logical_channel_address port. The PMA controls
of all the transceiver channels connected to the ALTGX_RECONFIG instance are
reconfigured.
The Use the same control signal for all the channels option is available on the
Analog controls tab of the ALTGX_RECONFIG MegaWizard Plug-In Manager. If you
enable this option, the width of the PMA control ports are fixed as follows:
PMA Control Ports Used in a Write Transaction
■ tx_vodctrl is fixed to 3 bits
■ tx_preemp is fixed to 5 bits
■ rx_eqdcgain is fixed to 2 bits
■ rx_eqctrl is fixed to 4 bits
Figure 3–5. Read Transaction Waveform—Use ‘logical_channel_address port’ Option
Notes to Figure 3–5:
(1) In this waveform example, you want to read from only the transmitter portion of the channel.
(2) In this waveform example, the number of channels connected to the dynamic reconfiguration controller is four. Therefore, the
logical_channel_address port is 2 bits wide.
read
(2) 2'b00 2'b01
3'b111 3'bXXX 3'b001
busy
(1) 2'b00 2'b10
reconfig_clk
rx_tx_duplex_sel [1:0]
logical_channel_address [1:0]
data_valid
tx_vodctrl_out [2:0]