TLK10002
www.ti.com
SLLSE75 –MAY 2011
LOOPBACK_TP_CONTROL — Address: 0x0B Default: 0x0700
BIT(s)
NAME
DESCRIPTION
ACCESS
RW
B.15:14 RESERVED
For TI use only
B.13
B.12
HS_TP_GEN_EN
HS_TP_VERIFY_EN
0 = Normal operation (Default 1’b0)
1 = Activates test pattern generation selected by bits B.10:8
RW
0 = Normal operation (Default 1’b0)
RW
1 = Activates test pattern verification selected by bits B.10:8
B.10:8 HS_TEST_PATT_SEL[2:0]
Test Pattern Selection. Note that for CRPAT, TPsync must be high to be valid. See
MDIO bit F.15.
RW
000 = High Frequency Test Pattern
001 = Low Frequency Test Pattern
010 = Mixed Frequency Test Pattern
011 = CRPAT Short
100 = CRPAT Long
101 = 27 - 1 PRBS pattern
110 = 223 - 1 PRBS pattern
111 = 231 - 1 PRBS pattern (Default 3’b111)
Errors can be checked by reading HS_ERROR_COUNTER register (0x10)
B.7
LS_TP_GEN_EN
0 = Normal operation (Default 1’b0)
RW
1 = Activates test pattern generation selected by bits B.5:4 on the LS side
Requires setting of LS_RX_ENTEST (8.2) for desired lane on the LS side
B.6
LS_TP_VERIFY_EN
0 = Normal operation (Default 1’b0)
1 = Activates test pattern verification selected by bits B.5:4 on the LS side
Requires setting of LS_TX_ENTEST (8.3) for desired lane on the LS side
RW
RW
B.5:4
LS_TEST_PATT_SEL[1:0]
Test Pattern Selection
00 = 231 - 1 PRBS pattern (Default 2’b00)
01 = Alternating 0/1 pattern with a period of 2 UI (LS side bit UI)
10 = 27 - 1 PRBS pattern
11 = 223 - 1 PRBS pattern
B.3
DEEP_REMOTE_LPBK
0 = Normal functional mode (Default 1’b0)
RW
1 = Enable deep remote loopback mode
Requires setting of LS_TX_ENTEST(8.3) and LS_RX_ENTEST (8.2) for desired lane
on the LS side.See Figure 12 and MDIO bit 6.7 for additional controls.
B.2
B.1
B.0
SHALLOW_REMOTE_LPBK
DEEP_LOCAL_LPBK
0 = Normal functional mode (Default 1’b0)
1 = Enable shallow remote loopback mode/serial retime mode
RW
RW
RW
See Figure 13
0 = Normal functional mode (Default 1’b0)
1 = Enable deep remote loopback mode
See Figure 14
SHALLOW_LOCAL_LPBK
0 = Normal functional mode (Default 1’b0)
1 = Enable shallow remote loopback mode
See Figure 15
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