DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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11.2 Global Register Definitions for Ethernet Mapper
Functions contained in the global registers include: framer reset, LIU reset, device ID, and BERT interrupt status.
These registers are preserved to provide code compatibility with the multiport devices in this product family. The
global registers bit descriptions are presented below.
Register Name:
GL.IDRL
Register Description:
Global ID Low Register
Register Address:
00h
Bit
# 7 6 5 4 3 2 1 0
Name
ID07
ID06
ID05
ID04
ID03
ID02
ID01
ID00
Default
0 0 1 1 0 0 0 0
Bit 7: ID07
Reserved for future use
Bit 6: ID06
Reserved for future use
Bit 5: ID05
If this bit is set the device contains a RMII interface
Bit 4: ID04
If this bit is set the device contains a MII interface
Bit 3: ID03
If this bit is set the device contains an Ethernet PHY
Bits 0-2: ID00-ID02
A three-bit count that is equal to 000b for the first die revision, and is incremented with each
successive die revision. May not match the two-letter die revision code on the top brand of the device.
Register Name:
GL.IDRH
Register Description:
Global ID High Register
Register Address:
01h
Bit
# 7 6 5 4 3 2 1 0
Name
ID15
ID14
ID13
ID12
ID11
ID10
ID09
ID08
Default
0 0 0 0 0 0 1 0
Bits 5-7: ID13-15
Number of Ethernet ports in the device minus 1. (i.e. 000 = 1 Ethernet port)
Bit 4: ID12
If this bit is set the device has LIU functionality
Bit 3: ID11
If this bit is set the device has a framer
Bit 2: ID10
Reserved for future use
Bit 1: ID09
If this bit is set the device has HDLC or X.86 encapsulation
Bit 0: ID08
If this bit is set the device has inverse multiplexing functionality