CMX980AL7 CML Microcircuits, CMX980AL7 Datasheet - Page 24

• Manufacturer Part Number: CMX980AL7
• Description: TETRA Baseband Processor
• Manufacturer: CML Microcircuits

TETRA Baseband Processor
Title:
Address:
Function:
Description:
(5,4) CommandReadDataMode
Bit
7
6
5
4
3
2
1
0
1999 Consumer Microcircuits Limited
DataRateHi
TxHandshakeEn
BiDirCmdPortEn
RxDataForCmdRdEn
LowRxRdFS
RxDataPortDisable
RdCmdPortDisable
SymboModuBypass
ConfigCtrl1
Configuration Control register
$0x00
RW
General configuration bits, together with operational control signal bits.
Name
UNIVERSAL REGISTERS ACCESSIBLE IN ALL PAGES
High
High
High
High
00
01
10,11
High
High
High
High
Active State
RW
RW
RW
RW
RW
RW
RW
RW
RW
When set active all serial port data transfers will be at
half of the master clock rate. When inactive, all serial
port data rates will be at a quarter of the master clock
rate. This has the effect of altering the Rx sample output
rate from 8 times the symbol rate when active to 4 times
when inactive.
When set active enables the transmit hardware interlock
protocol, thereby stopping the Serial Clock (SClk) if the
transmit path is enabled and the transmit FIFO is full.
When this bit is set active the Cmd port will drive its
data line out of the chip for the last 8 bits of read
operations. When set inactive command read data will
be returned on either the Rx or the CmdRd port
(default).
This bit only takes effect if the BiDirCmdPortEn bit is
inactive. When set active this bit causes all command
read operations to respond with data on the Rx serial
port. When set inactive the command read data will be
output via the CmdRd port (default).
The BiDirCmdPortEn bit and RxDataForCmdRdEn bit
together control the method by which command read
data is returned to the user.
(Default) Read data returned on CmdRd port.
Read data returned on Rx port and CmdRd port
Read data returned on Cmd port.
When set active both the CmdRdFS and the RxFS
output pins will be driven active low, when set inactive
the two frame sync's will be driven active high (default).
When set active tristates the RxDat and RxFS pins.
When set active tristates the CmdRdDat and CmdRdFS
pins.
Setting this bit bypasses the modulator, thereby taking
the least significant 3 bits of each Command Transmit
Data Serial Word received via the serial interface to
represent an absolute constellation mapping.
24
Function
CMX980A
D/980A/3