mt9094apr1 Zarlink Semiconductor, mt9094apr1 Datasheet - Page 18

• Manufacturer Part Number: mt9094apr1
• Description: Fully Featured Digital Telephone Circuit With Embedded Dsp For Tone Generation And Hands Free Operation
• Manufacturer: Zarlink Semiconductor

Note: Bits marked "-" are reserved bits and should be written with logic "0".
Timing Control Register
Loop-back Register
All bits active high:
Ch
Ch
LB
LB
2
1
io
oi
EN and Ch
EN
Active high enables data from the ST-BUS input to be looped back to the ST-BUS output directly at the pins. The DSTo tri-state driver
Active high enables data from ST-BUS output to be looped back to the ST-BUS input directly at the pins.
must also be enabled using one of the channel enable signals.
3
EN
-
Channels 2 and 3 are the B1 and B2 channels, respectively. PCM associated with the DSP, Filter/CODEC and transducer audio
Transmit B1 and B2 data on DSTo
Receive B1 and B2 data on DSTi
Channel 1 conveys the control/status information for the layer 1 transceiver. The full 64kb/s bandwidth is available and is assigned
paths is conveyed in one of these channels as selected in the timing control register.
according to which transceiver is being used. Consult the data sheets for the transceiver selected. When high register data is trans-
mitted on DSTo. When low this timeslot is tri-stated on DSTo. Receive C-Channel data (DSTi) is always routed to the register
regardless of this control bit's logic state.
-
7
7
When high PCM from the Filter/CODEC and DSP is transmitted on DSTo in the associated channel. When low DSTo is
When enabled PCM from DSTi is routed to the DSP and Filter/CODEC in the associated channel. If both Ch
forced to logic 0 for the corresponding timeslot. If both Ch
are enabled, data input defaults to channel 2.
LBio
-
6
6
LBoi
5
5
-
-
-
4
4
CH
Zarlink Semiconductor Inc.
-
3
3
3
EN
MT9094
CH
18
-
2
2
2
EN
CH
2
EN and Ch
1
-
1
1
EN
ADDRESS = 16h WRITE/READ VERIFY
ADDRESS = 15h WRITE/READ VERIFY
3
EN are enabled, data defaults to channel 2.
-
0
-
0
ADDRESSES 17h - 1Ch are RESERVED
Power Reset Value
Power Reset Value
X00X XXXX
XX0X 0000
2
EN and Ch
Data Sheet
3
EN