CMX605P3 View Datasheet(PDF) - MX-COM Inc
Part Name
Description
MFG CO.
'CMX605P3' PDF : 26 Pages View PDF
Digital Line to POTS Interface
4.9 ‘C-BUS’ Registers
Addr
$01
$D0
Register
RESET
SETUP
$D1 MODE
$D3 TX DATA
$D4 TX TONES
7
N/A
Uncommitted
Amplifier
0 = Disable
1 = Enable
SPM Output:
0 = Disable
1 = Enable
D7
D7
Page 13 of 26
CMX605 Preliminary Information
6
N/A
Tx Enable:
0 = Disable
1 = Enable
Command Data Byte (Bits 7 – 0)
5
4
3
N/A
N/A
N/A
DTMF Rx: SPM: Reserved
0 = Disable 0 = 12kHz set to 0
1 = Enable 1 = 16kHz
2
N/A
Reserved
set to 0
1
N/A
FSK mode:
0 = Sync
1 = Async
0
N/A
FSK mode:
0 = V23
1 = Bell 202
Tone/FSK:
0 = Disable
1 = Enable
D6
D6
Tone/FSK:
0 = Tone
1 = FSK
D5
D5
Tx Level:
(MSB)
D4
D4
Tx Level:
D3
D3
Tx Level: Tone Fields: Tone Fields:
(LSB)
(MSB)
(LSB)
D2
D1
D0
D2
D1
D0
Table 10: Write Only Registers
Addr. Register
$DF STATUS
7
FSK Mode:
FSK Tx Data
Underflow
6
FSK Mode:
FSK Tx
Data Ready
Reply Data Byte (Bits 7 – 0)
5
4
3
DTMF Rx: DTMF Rx:
DTMF:
Status
Change
1 = Detected
0 = NoTone
Timer timed
out
Rx Data
(D3)
(MSB)
Table 11: Read Only Registers
2
DTMF:
Rx Data
(D2)
1
DTMF:
Rx Data
(D1)
0
DTMF:
Rx Data
(D0)
(LSB)
Notes:
1. Accessing the RESET Register over the ‘C-BUS’ clears all of the bits in the SETUP, MODE, TX DATA, TX
TONES and STATUS registers. This will initialize the device.
Note that this is a single-byte ‘C-BUS’ transaction consisting solely of the address byte value $01.
2. If any of bits 5, 6 or 7 of the STATUS Register is ‘1’ then the IRQ output will be pulled low.
3. Reading the STATUS Register clears the IRQ output and also clears bit 5 of the STATUS Register, if set.
Bits 6 and 7 of the STATUS Register are cleared on writing to the TX DATA Register.
¤2001 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480195.005
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.
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