CMX625D5 CML Microcircuits, CMX625D5 Datasheet - Page 20

• Manufacturer Part Number: CMX625D5
• Description: ISDN TA POTS Interface
• Manufacturer: 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 and also clears bits 2, 3, and 5 of the
$C
$0
$A
$B
$1
$3
$4
$5
$6
$8
$9
2000 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.
STATUS Register, if set. Bits 6 and 7 of the STATUS Register are cleared on writing to the TX
DATA Register.
CONTROL
CONTROL
DTMF RX
ERRUPT
Register
Register
STATUS
DEVICE
CODEC
RESET
SETUP
TONES
MODE
MASK
DATA
DATA
INT-
IOM
TX
TX
ID
FSK Tx Data
FSK Mode:
Underflow
0=Disable
SPM O/P:
0=Disable
0=Disable
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
Status [6]
1=Enable
1=Enable
Select [0]
0=A-Law
1=µ-Law
Channel
Codec
Ready
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]
Loopback
Analogue
Change
0=Tone
1=FSK
Status
Mask
Local
N/A
D5
D5
5
0
5
0
0
Bus Reversal
Digital Codec
0=No loopbk
1=Loopback
1=Detected
IC Channel
0=No Tone
1=Reverse
DTMF Rx:
0=Normal
Status [4]
Loopback
Time Out
0=12kHz
1=16kHz
Tx Level:
Data Byte Structure
Data Byte Structure
SPM:
Mask
Local
MSB
20
LSB
N/A
D4
D4
4
1
0
4
0=No loopbk
1=Loopback
Ring Signal
Digital IOM
(D3 MSB)
Loopback
Status [3]
Select [1]
Tx Level:
Rx Data
Remote
DTMF:
Abort
Mask
MSB
IOM:
N/A
D3
D3
Tx
3
0
3
1
C/I1 Channel
Ring Signal
Control [2]
Select [0]
Status [2]
Tx Level:
Rx Data
DTMF:
Output
Abort
Mask
IOM:
(D2)
LSB
N/A
D2
D2
Rx
2
0
2
0
C/I1 Channel
Tone Fields:
FSK Mode:
Control [1]
1=Async
Rx Data
0=Sync
DTMF:
Output
MSB
(D1)
N/A
D1
D1
1
0
0
1
0
0
C/I1 Channel
Tone Fields:
FSK Mode:
1=Bell 202
Control [0]
(D0 LSB)
Rx Data
DTMF:
Output
0=V23
LSB
LSB
LSB
N/A
D0
D0
0
1
0
0
0
0
CMX625
D/625/1