HC4GX15 Datasheet, PDF (515/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 2: HardCopy IV GX Dynamic Reconfiguration
2–57
PMA Controls Reconfiguration
Figure 2–23 shows the Use the same control signal for all channels option in the
ALTGX_RECONFIG MegaWizard Plug-In Manager.
Figure 2–23. Use the Same Control Signals for all Channels Option in the ALTGX_RECONFIG MegaWizard Plug-In Manager
Use the Same Control Signal for All Channels Option Enabled
The Use the same control signal for all channels option is available in the Analog
controls screen of the ALTGX_RECONFIG MegaWizard Plug-In Manager. If enabled,
the width of the PMA control ports are fixed as shown below.
PMA Control Ports Used in a Write Transaction:
■ tx_vodctrl is fixed to 3 bits
■ tx_preemp_0t, tx_preemp_1t, and tx_preemp_2t are fixed to 5 bits
■ rx_eqdcgain is fixed to 3 bits
■ rx_eqctrl is fixed to 4 bits
PMA Control Ports Used in a Read Transaction:
■ tx_vodctrl_out is 3 bits per channel
■ tx_preemp_0t_out, tx_preemp_1t_out, and tx_preemp_2t_out are 5 bits
per channel
■ rx_eqdcgain_out is 3 bits per channel
■ rx_eqctrl_out is to 4 bits per channel
For example, if the number of channels controlled by the dynamic reconfiguration
controller is 2, tx_vodctrl_out is 6 bits wide.
© June 2009 Altera Corporation
HardCopy IV Device Handbook, Volume 3