DS92UT16TUF Datasheet, PDF (51/86 Pages) National Semiconductor (TI) – UTOPIA-LVDS Bridge for 1.6 Gbps Bi-directional Data Transfers

18.0 Register Description (Continued)
18.19 ATM LOOPBACK MPhy — 0x1B ALBMP
7
Reserved
6
Reserved
5
Reserved
TABLE 39. ALBMP
4
LBMP[4]
3
LBMP[3]
2
LBMP[2]
1
LBMP[1]
0
LBMP[0]
Type:
Read/Write
Software Lock: No
Reset Value: 0x00
The ATM Loopback MPhy register defines the MPhy address attached to the ATM loopback cell. Setting the TXLVLB bit in the
ALBC register initiates these loopback cells.
• LBMP[4:0] ATM loopback cell five bit MPhy address.
18.20 ATM LOOPBACK CELL FORMAT — 0x1C to 0x1F ALBCF3 to ALBCF0
ALBCF3 0x1C
ALBCF2 0x1D
ALBCF1 0x1E
ALBCF0 0x1F
7
ALBCF3[7]
ALBCF2[7]
ALBCF1[7]
ALBCF0[7]
6
ALBCF3[6]
ALBCF2[6]
ALBCF1[6]
ALBCF0[6]
TABLE 40. ALBCF3–ALBCF0
5
ALBCF3[5]
ALBCF2[5]
ALBCF1[5]
ALBCF0[5]
4
ALBCF3[4]
ALBCF2[4]
ALBCF1[4]
ALBCF0[4]
3
ALBCF3[3]
ALBCF2[3]
ALBCF1[3]
ALBCF0[3]
2
ALBCF3[2]
ALBCF2[2]
ALBCF1[2]
ALBCF0[2]
1
ALBCF3[1]
ALBCF2[1]
ALBCF1[1]
ALBCF0[1]
0
ALBCF3[0]
ALBCF2[0]
ALBCF1[0]
ALBCF0[0]
Type:
Read/Write
Software Lock: No
Reset Value: 0x00
The ALBCF3, ALBCF2, ALBCF1 and ALBCF0 registers define the format of the ATM loopback cell header.
• ALBCF3[7:0] Loopback Cell header byte H1 format.
• ALBCF2[7:0] Loopback Cell header byte H2 format.
• ALBCF1[7:0] Loopback Cell header byte H3 format.
• ALBCF0[7:0] Loopback Cell header byte H4 format.
18.21 RECEIVE PORT A LINK LABEL — 0x20 RALL
7
RALL[7]
6
RALL[6]
5
RALL[5]
TABLE 41. RALL
4
RALL[4]
3
RALL[3]
2
RALL[2]
1
RALL[1]
0
RALL[0]
Type:
Read only
Software Lock: No
Reset Value: 0x00
The Receive Port A Link Label register contains the Link Trace Label byte received in TC6 on receive Port A. Whenever the
received link label changes value, the RALLC alarm bit in the RALA register is set, which will raise an interrupt if the
corresponding interrupt enable bit is set.
• RALL[7:0] Port A Received Link Trace Label byte contents.
18.22 RECEIVE PORT A EXPECTED LINK LABEL — 0x21 RAELL
7
RAELL[7]
6
RAELL[6]
5
RAELL[5]
TABLE 42. RAELL
4
RAELL[4]
3
RAELL[3]
2
RAELL[2]
1
RAELL[1]
0
RAELL[0]
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