CMX989 Datasheet, PDF (13/31 Pages) CML Microcircuits – CDPD MAC and Data Pump Processor

CDPD MAC and Data Pump Processor
CMX989
TX MODEM CONTROL Register (Hex address $05)
MOD 2 GAIN
(Bits 7, 6, 5 and 4)
These bits control the amplitude of the TXOP2 output according to the table
below.
(Bit 7)
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
(Bit 6)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
(Bit 5)
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
(Bit 4)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
GAIN (dB)
OFF (o/p at V_BIAS)
-5.6
-5.2
-4.8
-4.4
-4.0
-3.6
-3.2
-2.8
-2.4
-2.0
-1.6
-1.2
-0.8
-0.4
0.0
MOD 1 GAIN
(Bits 3, 2, 1 and 0)
These bits control the amplitude of the TXOP1 output according to the table
below.
(Bit 3)
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
(Bit 2)
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
(Bit 1)
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
(Bit 0)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
GAIN (dB)
OFF (o/p at V_BIAS)
-5.6
-5.2
-4.8
-4.4
-4.0
-3.6
-3.2
-2.8
-2.4
-2.0
-1.6
-1.2
-0.8
-0.4
0.0
© 2001 Consumer Microcircuits Limited
13
D/989/2