CMX981 Consumer Microcircuits Limited, CMX981 Datasheet - Page 35

• Manufacturer Part Number: CMX981
• Description: Advanceddigital Radio Baseband Processor (tetra Etc.)
• Manufacturer: Consumer Microcircuits Limited

Advanced Digital Radio Baseband Processor
5.11.23 $20-$21
5.11.24 $22-$23
 2002 CML Microsystems Plc
For write access, the least significant bit of the address is used as bit 8 of the data word.
The value written to this register controls the proportion of the Q channel amplitude that is added
to the I channel to adjust the phase. The value of this register is in 2's complement format.
For read access, two read commands must be issued.
The value written in this register is used to control the gain of the transmitted data. The equation
for this is:
The value of this register is in 2's complement format, allowing phase inversion.
$20
$22
$21
$23
Bit
Bit
Bit
Bit
Bit
Undefined
Not Used.
Used. Set
on read.
this bit
8
low.
Not
7
7
7
7
TxIPhase
TxIGain
D
out
= D
Undefined
Not Used.
Not Used.
7
on read.
Set this
bit low.
in
6
6
* [G
6
6
val
6
/ 2
Not Used.
Undefined
Not Used.
on read.
Set this
bit low.
11
5
5
5
5
]
Transmit I Channel Phase Register
Transmit I Channel Gain Register
where: D
Transmit I channel phase [8:0]
Transmit I channel phase [7:0]
Transmit I channel gain [7:0]
5
35
Not Used.
Undefined
Not Used.
Set this
on read.
bit low.
4
4
4
4
D
G
out
in
val
is the signal input, and
4
is the signal output,
is the value in the register.
Undefined
Not Used.
on read.
3
3
3
3
3
Transmit I channel gain [11:8]
Not Used.
Undefined
on read.
2
2
2
2
2
Undefined
Not Used.
on read.
1
1
1
1
1
I channel
phase [8]
Transmit
0
0
CMX981
D/981/1
0
0
0