CMX615P3 CMLMICRO [CML Microcircuits], CMX615P3 Datasheet - Page 13

• Manufacturer Part Number: CMX615P3
• Description: Digital Line to POTS Interface
• Manufacturer: CMLMICRO [CML Microcircuits]

Digital Line to POTS Interface
1.5.8
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,
TX DATA, TX TONES and STATUS registers. This will set the device into the Zero Power mode.
Note that this is a single-byte ‘C-BUS’ transaction consisting solely of the address byte value $01.
2. If any of bits 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. Bits 6 and 7 of the STATUS Register are
1999 Consumer Microcircuits Limited
cleared on writing to the TX DATA Register.
STATUS
Register
Register
TONES
RESET
SETUP
MODE
‘C-BUS’ Registers
DATA
TX
TX
Uncommitted
Amplifier:
0 = Powersave
1 = Not
SPM O/P:
0 = Disable
1 = Enable
D7
D7
FSK Mode:
FSK Tx Data
Underflow
Powersave
7
N/A
7
FSK Mode:
FSK Tx
Data Ready
Tx Powersave:
0 = Powersave
1 = Not
Tone/FSK:
0 = Disable
1 = Enable
D6
D6
6
Powersave
N/A
6
Reserved
set to 0
5
Reserved
set to 0
Tone/FSK:
0 = Tone
1 = FSK
D5
D5
Command Data Byte (Bits 7 - 0)
Reply Data Byte (Bits 7 - 0)
N/A
Reserved
set to 0
5
13
4
SPM:
0 = 12kHz
1 = 16kHz
Tx Level:
(msb)
D4
D4
N/A
4
Reserved
set to 0
3
Reserved
set to 0
Tx Level:
D3
D3
N/A
3
Reserved
set to 0
2
Reserved
set to 0
Tx Level:
(lsb)
D2
D2
N/A
2
Reserved
set to 0
1
FSK mode:
0 = Sync
1 = Async
Tone
Fields:
D1
D1
(msb)
N/A
1
Reserved
set to 0
CMX615
D/615/4
FSK
mode:
0 = V23
1 = Bell
202
Tone
Fields:
D0
D0
0
(lsb)
N/A
0