MT90528 Datasheet, PDF (145/195 Pages) Zarlink Semiconductor Inc – 28-Port Primary Rate Circuit Emulation AAL1 SAR

MT90528
Data Sheet
Address: 4002 (Hex)
Label: UNCB
Reset Value: 0000 (Hex)
Label
Bit
Position
Type
Description
Reserved
15:10
R/O Always reads “0000_00”.
Note: The contents of this register are used to determine how many bits of the cell header are used to form the look-up table addresses.
The user selects up to 16 of the bits of the GFC/VPI and VCI fields to be used for the look-up table search. A minimum of 4 bits (from the
VCI) and a maximum of 16 bits (all from the VCI or from a combination of both the VCI and VPI) of the header must be used for searches.
Table 62 - UTOPIA Number of Concatenated Bits Register
Address: 4004 (Hex)
Label: ULBA
Reset Value: 0000 (Hex)
Label
LUT_BASE_ADD
Bit
Position
15:0
Type
Description
R/W Contains the 16 most significant bits of the Look-Up Table base address. These bits repre-
sent byte address bits<20:5> of the external memory.
If N+M is greater than 4, bits<(N+M):5> of the Look-Up Table base address should be
set to 0. (For example, if N+M=7, bits<7:5> should be set to “000”)
Table 63 - LUT Base Address Register
Address: 4006 (Hex)
Label: UVCM
Reset Value: 0000 (Hex)
Label
VC_MATCH
Bit
Position
15:0
Type
R/W
Description
Contains match values for each of the bits in the VCI.
Table 64 - VC Match Register
Address: 4008 (Hex)
Label: UVCME
Reset Value: 0000 (Hex)
Label
VC_MATCH_ENB
Bit
Position
15:0
Type
Description
R/W Each bit, when set, enables the comparison of a cell’s VCI and the corresponding
VC_MATCH bit. If a bit in this register is not set, the corresponding bit in the received cell
VCI is considered valid, regardless of the setting in the VC_MATCH field.
Table 65 - VC Match Enable Register
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