EV8680 Datasheet, PDF (22/39 Pages) CML Microcircuits – Evaluation Kit

Evaluation Kit for CMX868
EV8680
Reg
S20
S21
Range
0-255
0-255
Units
Decimal
Decimal
S-Register
Description
Reserved
BERT options - Provides the following
functions:
Bit 0 - BERT End, 0 Rx Board (AT@F4), 1
Tx Board (AT@F5)
Bit 1 - BERT Operating Band (ignored for
V23/Bell202 BERT operation), 0 Low, 1
High
Bit 2, 3, 4, 5 - Reserved
Bit 6,7 - BERT Scrambler/Descrambler, 11
Enabled (64 ones detect circuit enabled),
10 Enabled (64 ones detect circuit
disabled), 00 Disabled
S22 0-255 Decimal Bit Mapped register - Provides the following
functions:
Bit 0, 1, 2, 3, 4 - Reserved
Bit 5, 6, 7 - Calling Characteristics, 000
(ATX0), 100 (ATX1), 101 (ATX2), 110
(ATX3), 111 (ATX4)
S23 0-255 Decimal Bit Mapped register - Provides the following
functions:
Bit 0, 1, 2, 3, 4, 5 - Reserved
Bit 6, 7 - Guard Tones (DPSK/QAM high
band operation only), 00 None (AT&G0), 11
550Hz (AT&G1), 10 1800Hz (AT&G2)
S24 0-255 Decimal Bit Mapped register - Provides the following
functions:
Bit 0 - CMX868 Xtal Freq, 0 12.2880MHz, 1
11.0592MHz
Bit 1 - CMX868 Tx and Rx Fixed
Compromise Equalisers (used during
negotiation and data transfer), 0 Enable,
1 Disable
Bit 2 - CMX868 Auto Equaliser (DPSK
operating modes, always enabled during
V22bis QAM operation), 0 Disable, 1
Enable
Bit 3, 4, 5, 6, 7 – Reserved
Factory Profiles
‘0’
‘1’
0
0
193
193
0
0
0
0
1
3
© 2000 Consumer Microcircuits Limited
22
UM8680/2