RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
Register 0x80120: UI Common Configuration Register (UI_COMN_CFG)
Bit
Type
Function
Default
15:5
R
Unused
VP_MODE_EN
SHIFT_VCI
VCI_U2U _LOOP
U2U_LOOP
UI_EN
X
0
0
0
0
0
4
3
2
1
0
R/W
R/W
R/W
R/W
R/W
This register controls the general configuration of the Utopia Interface
UI_EN
When set, enables the UTOPIA Interface in both directions. When this bit is
cleared (disabled) all the UI logic is held in reset and all the UTOPIA FIFO’s
are cleared and all the UTOPIA outputs are tristated. The AAL1gator-8 will
not respond in the UTOPIA interface when this bit is disabled. The registers
are not affected by this bit.
0) UI is disabled
1) UI is enabled
Note: UI_EN must only be set AFTER all other UI interface registers are
configured.
U2U_LOOP
When set, all cells received by UI are sent back out to the UI (regardless of
single or multi-addressing mode).
0) UI in normal mode
1) UI in remote loopback mode
VCI_U2U_LOOP
When set, all cells received by UI with a VCI which matches the VCI
programmed in the U2U_LOOP_VCI register are sent back out by Utopia. To
avoid any momentary corruption of data, this bit should only be changed
when UI_EN is disabled.
0) UI in normal mode
1) UI in VCI based remote loopback mode
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