
Table 9-22: DPTX_PRE_VOLT3 Bits
Bit Bit Name Function
31:4 Unused
3:2
PRE3
Pre-emphasis output on lane 3
1:0
VOLT3
Voltage swing output on lane 3
DPTX_RECONFIG
RECONFIG_ANALOG drives the tx_analog_reconfig port (tx_analog_reconfig_req) , while
RECONFIG_LINKRATE drives the tx_reconfig port, (tx_reconfig_req) . GXB_BUSY connects to the
tx_analog_reconfig input ports (tx_analog_reconfig_busy, and tx_reconfig tx_reconfig_busy).
Address: 0×0014
Direction: RW
Reset: 0×00000000
Table 9-23: DPTX_RECONFIG Bits
Bit Bit Name Function
31
GXB_BUSY
Read-only flag where:
• 0 = Transceiver is not busy
• 1 = Transceiver is busy
30:2 Unused
1
RECONFIG_LINKRATE
This flag always reads back at 0.
1 = Reconfigure the transceiver with the link rate in
DPTX_TX_CONTROL (TX_LINK_RATE)
0
RECONFIG_ANALOG
This flag always reads back at 0.
1 = Reconfigure transceiver with analog values in
DPTX_PRE_VOLT0-3
Source Timestamp
The Nios II processor can use this global, free-running counter to generate timestamps and delays. The
same counter is used in both sink and source instantiations (DPRX_TIMESTAMP is always equal to
DPTX_TIMESTAMP).
Address: 0×001F
Direction: RO
Reset: 0×00000000
UG-01131
2015.05.04
DPTX_RECONFIG
9-11
DisplayPort Source Register Map and DPCD Locations
Altera Corporation
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