Qdatasheet_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

CMX868P4 View Datasheet(PDF) - MX-COM Inc

Part Name
Description
MFG CO.
CMX868P4
MX-COM
MX-COM Inc  MX-COM
'CMX868P4' PDF : 43 Pages View PDF
Low Power V.22bis Modem
20
CMX868 Advance Information
Tx Mode Register Bits 11-9: Tx level
These 3 bits set the gain of the Tx Level Control block.
Bit 11 Bit 10 Bit 9
1
1
1 0dB
1
1
0 -1.5dB
1
0
1 -3.0dB
1
0
0 -4.5dB
0
1
1 -6.0dB
0
1
0 -7.5dB
0
0
1 -9.0dB
0
0
0 -10.5dB
Tx Mode Register b8-7: Tx Guard tone (QAM, DPSK modes)
These 2 bits select the guard tone to be transmitted together with highband QAM or DPSK.
Set both bits to 0 in FSK modes.
Bit 8
Bit 7
1
1
Tx 550Hz guard tone
1
0
Tx 1800Hz guard tone
0
x
No Tx guard tone
Tx Mode Register b6-5: Tx Scrambler (QAM, DPSK modes)
These 2 bits control the operation of the Tx scrambler used in QAM and DPSK modes.
Set both bits to 0 in FSK modes.
Bit 6
Bit 5
1
1
Scrambler enabled, 64 ones detect circuit enabled (normal use)
1
0
Scrambler enabled, 64 ones detect circuit disabled
0
x
Scrambler disabled
Tx Mode Register b4-3: Tx Data Format (QAM, DPSK, FSK modes)
These two bits select Synchronous or Start-stop mode and the addition of a parity bit to
transmitted characters in Start-stop mode.
Bit 4
Bit 3
1
1
Synchronous mode
1
0
Start-stop mode, no parity
0
1
Start-stop mode, even parity bit added to data bits
0
0
Start-stop mode, odd parity bit added to data bits
Tx Mode Register b2-0: Tx Data and Stop bits (QAM, DPSK, FSK Start-Stop modes)
In Start-stop mode these three bits select the number of Tx data and stop bits.
b2
b1
b0
1
1
1 8 data bits, 2 stop bits
1
1
0 8 data bits, 1 stop bit
1
0
1 7 data bits, 2 stop bits
1
0
0 7 data bits, 1 stop bit
0
1
1 6 data bits, 2 stop bits
0
1
0 6 data bits, 1 stop bit
0
0
1 5 data bits, 2 stop bits
0
0
0 5 data bits, 1 stop bit
¤2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480205.007
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
Share Link: GO URL

All Rights Reserved © qdatasheet.com  [ Privacy Policy ] [ Contact Us ]