CMX605P3 CML Microcircuits, CMX605P3 Datasheet - Page 14

• Manufacturer Part Number: CMX605P3
• Description: Digital Line to POTS Interface
• Manufacturer: CML Microcircuits

Digital Line to POTS Interface
1.5.9
Write Only Registers
Read Only Registers
Notes:
Addr.
Addr.
$D0
$D1
$D3
$D4
$DF
$01
1. Accessing the RESET Register over the ‘C-BUS’ clears all of the bits in the SETUP, MODE,
2. If any of bits 5, 6 or 7 of the STATUS Register is ‘1’ then the IRQN output will be pulled low.
3. Reading the STATUS Register clears the IRQN output and also clears bit 5 of the STATUS
2001 Consumer Microcircuits Limited
TX DATA, TX TONES and STATUS registers. This will initialise the device and put it into zero-
power mode. Please allow 50ms for the oscillator, V
coming out of zero-power mode.
Note that this is a single-byte ‘C-BUS’ transaction consisting solely of the address byte value $01.
Register, if set. Bits 6 and 7 of the STATUS Register are cleared on writing to the TX DATA
Register.
STATUS
Register
Register
RESET
SETUP
TONES
‘C-BUS’ Registers
MODE
DATA
TX
TX
Uncommitted
Amplifier
0 = Disable
1 = Enable
SPM O/P:
0 = Disable
1 = Enable
D7
D7
FSK Mode:
FSK Tx Data
Underflow
7
N/A
7
FSK Mode:
FSK Tx
Data Ready
Tx Enable:
0 = Disable
1 = Enable
Tone/FSK:
0 = Disable
1 = Enable
D6
D6
6
N/A
6
DTMF Rx:
Status
Change
5
DTMF Rx:
0 = Disable
1 = Enable
Tone/FSK:
0 = Tone
1 = FSK
D5
D5
Command Data Byte (Bits 7 - 0)
Reply Data Byte (Bits 7 - 0)
N/A
DTMF Rx:
1 = Detected
0 = Notone
5
Timer timed
out
14
4
SPM:
0 = 12kHz
1 = 16kHz
Tx Level:
(msb)
D4
D4
N/A
4
BIAS
DTMF:
Rx Data
(D3) (msb)
and internal circuits to stabilize when
3
Reserved
set to 0
Tx Level:
D3
D3
N/A
3
DTMF:
Rx Data
(D2)
2
Reserved
set to 0
Tx Level:
(lsb)
D2
D2
N/A
2
DTMF:
Rx Data
(D1)
1
FSK mode:
0 = Sync
1 = Async
Tone
Fields:
D1
D1
(msb)
N/A
1
DTMF:
Rx Data
(D0) (lsb)
CMX605
D/605/6
FSK
mode:
0 = V23
1 = Bell
202
Tone
Fields:
D0
D0
0
(lsb)
N/A
0