CMX981 Consumer Microcircuits Limited, CMX981 Datasheet - Page 36

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

Advanced Digital Radio Baseband Processor
5.11.25 $24-$25
5.11.26 $26-$27
 2002 CML Microsystems Plc
The value written in this register controls the signal offset. The equation for this is:
The value of this register is in 2's complement format. Inappropriate values may cause arithmetic
overflow.
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.
$24
$26
$25
$27
Bit
Bit
Bit
Bit
Bit
Undefined
Not Used.
Used. Set
on read.
this bit
8
low.
Not
7
7
7
7
TxIOffset
D
TxQPhase
out
= D
Undefined
Not Used.
Not Used.
7
on read.
Set this
bit low.
in
6
6
+ [N
6
6
off
/ 2
6
Undefined
Not Used.
Not Used.
on read.
Set this
bit low.
11
5
5
5
5
]
Transmit Q channel phase [8:0]
Transmit I Channel Offset Register
where: D
Transmit Q Channel Phase Register
Transmit I channel offset [7:0]
Transmit Q channel phase [7:0]
5
36
Not Used.
Undefined
Not Used.
on read.
Set this
bit low.
4
4
4
4
D
N
out
in
off
is the signal input, and
4
is the value in the register.
is the signal output.
Undefined
Not Used.
on read.
3
3
3
3
3
Transmit I channel offset [11:8]
Undefined
Not Used.
on read.
2
2
2
2
2
Undefined
Not Used.
on read.
1
1
1
1
1
Transmit Q
phase [8]
channel
0
0
CMX981
D/981/1
0
0
0