HC4GX15 Datasheet, PDF (520/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–62
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Description of Transceiver Channel Reconfiguration Modes
Figure 2–26 shows a write transaction waveform with the Use the same control signal
for all channels option disabled.
Figure 2–26. Method 2: Write Transaction Waveform with the Use the Same Control Signal for All Channels Option Disabled
reconfig_clk
write_all
rx_tx_duplex_sel [1:0] ⁽¹⁾ 2’b00
2’b10
busy
tx_vodctrl [5:0] (2)
6’b000000
6’b000011
Notes to Figure 2–26:
(1) Consider that you want to write to only the transmitter portion of the channel.
(2) The waveform assumes that the number of channels controlled by the dynamic reconfiguration controller (ALTGX_RECONFIG instance) is 2 and
that the tx_vodctrl control port is enabled.
1 Simultaneous write and read transactions are not allowed.
Read Transaction
The read transaction is explained in “Read Transaction” on page 2–59.
Description of Transceiver Channel Reconfiguration Modes
This section describes the following dynamic reconfiguration modes:
■ Data Rate Division in TX mode
■ Channel and TX PLL select/reconfig modes
■ Channel and CMU PLL reconfiguration
■ Channel reconfiguration with TX PLL select
■ CMU PLL reconfiguration
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation