Dprx_ber_cnt0, Dprx_ber_cnt1, Sink timestamp – Altera DisplayPort MegaCore Function User Manual
Page 158: Sink bit-error counters, Dprx_ber_cnti0, Dprx_ber_cnt0 -7, Dprx_ber_cnt1 -7, Sink timestamp -7, Sink bit-error counters -7, Dprx_ber_cnti0 -7
Bit
Bit Name
Function
1:0
CNTSEL
Count selection:
• 00 = Disparity and illegal comma codes
• 01 = Disparity
• 10 = Illegal comma codes
• 11 = Reserved
DPRX_BER_CNT0
These registers are exposed in DPCD locations
SYMBOL_ERROR_COUNT_LANE0
and
SYMBOL_ERROR_COUNT_LANE1
.
DPRX_BER_CNT1
These registers are exposed in DPCD locations
SYMBOL_ERROR_COUNT_LANE2
and
SYMBOL_ERROR_COUNT_LANE3
.
Sink 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: 0×0005
Direction: RO
Reset: 0×00000000
Table 10-7: DPRX_TIMESTAMP Bits
Bit
Bit Name
Function
31:24
Unused
8’b00000000
23:0
TIMESTAMP
Free-running counter value (1
tick equals 100 µs)
Sink Bit-Error Counters
DPRX_BER_CNTI0
Internal bit-error counters for lane 0 and lane 1.
Address: 0×0006
Direction: RO
UG-01131
2015.05.04
DPRX_BER_CNT0
10-7
DisplayPort Sink Register Map and DPCD Locations
Altera Corporation