CMX625P4 CMLMICRO [CML Microcircuits], CMX625P4 Datasheet - Page 20

• Manufacturer Part Number: CMX625P4
• Description: ISDN TA POTS Interface
• Manufacturer: CMLMICRO [CML Microcircuits]

Addr.
Addr.
ISDN TA POTS Interface
1.5.14 Register Set
Write Only Registers
Read Only Registers
Notes:
1. Accessing the RESET Register clears all of the bits in the SETUP, MODE, TX DATA, TX TONES,
2. If any of bits 2, 3, 4, 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 (when the appropriate bit contains an
1.5.15 Programming the CMX625
$A
$B
$C
$0
$1
$3
$4
$5
$6
$8
$9
2001 Consumer Microcircuits Limited
IOM CONTROL, INTERRUPT MASK, CODEC CONTROL, STATUS and DTMF RX DATA registers
and will initialise the device. This a single-byte transaction consisting of the address byte value $1.
when the appropriate bit contains an unmasked logic ‘1’ in the INTERRUPT MASK Register.
unmasked logic ‘1’ in the INTERRUPT MASK Register) and also clears all the STATUS Register bits 2
to 7, if set.
CONTROL
CONTROL
DTMF RX
ERRUPT
Register
Register
STATUS
DEVICE
CODEC
RESET
SETUP
TONES
MODE
MASK
DATA
DATA
IOM
INT-
TX
TX
ID
FSK Tx Data
FSK Mode:
0=Disable
SPM O/P:
0=Disable
0=Disable
Underflow
Tx Output
1=Enable
1=Enable
Select [1]
Status [7]
1=Enable
Channel
Enable
Codec
Codec
Buffer
Mask
MSB
MSB
N/A
D7
D7
7
1
0
7
FSK Tx Data
PCM Codec:
FSK Mode:
Tone/FSK:
Tx Enable
0=Disable
0=Disable
1=Enable
1=Enable
Status [6]
Select [0]
0=A-Law
1=µ-Law
Channel
Ready
Codec
Mask
N/A
D6
D6
6
6
0
0
0=No loopbk
1=Loopback
Tone/FSK:
DTMF Rx:
DTMF Rx:
0=Disable
1=Enable
Status [5]
Analogue
Loopback
Change
0=Tone
1=FSK
Status
Mask
Local
N/A
D5
D5
5
5
0
0
0
Bus Reversal
1=Detected
IC Channel
0=No Tone
1=Reverse
DTMF Rx:
0=Normal
Status [4]
Time Out
0=12kHz
1=16kHz
Tx Level:
Data Byte Structure
Data Byte Structure
SPM:
Mask
MSB
20
LSB
N/A
D4
D4
4
1
0
4
0
0=No loopbk
1=Loopback
Ring Signal
Digital IOM
(D3 MSB)
Loopback
Select [1]
Status [3]
Tx Level:
Rx Data
Remote
DTMF:
Abort
Mask
IOM:
MSB
N/A
D3
D3
Tx
3
0
3
1
Ring Signal
Control [2]
Status [2]
Select [0]
Tx Level:
Channel
Rx Data
DTMF:
Output
Abort
Mask
IOM:
LSB
(D2)
C/I1
N/A
D2
D2
Rx
2
0
2
0
Tone Fields:
FSK Mode:
Control [1]
1=Async
Channel
Rx Data
0=Sync
DTMF:
Output
MSB
(D1)
C/I1
N/A
D1
D1
1
0
0
1
0
0
Tone Fields:
FSK Mode:
1=Bell 202
Control [0]
(D0 LSB)
Channel
Rx Data
DTMF:
Output
0=V23
LSB
LSB
LSB
C/I1
N/A
D0
D0
0
0
1
0
0
0
CMX625
D/625/2