Preliminary Information

MT9160

7-89

DrGain

When high, the receiver driver gain is set to -6 dB, with sidetone.

When low, the receiver driver gain is set to 0 dB, with no sidetone.

Path Control

ADDRESS = 02h WRITE/READ VERIFY

Power Reset Value

XX00 0000

76543210

---

-

--

DrGain

-

PDFDI

When high, the FDI PLA and the Filter/Codec are powered down. When low, the FDI is active (default).

PDDR

When high, the ear driver and Filter/Codec are powered down. In addition, in ST-BUS mode, the selected output

channel is tri-stated. In SSI mode the PCM output code will be -zero code during the valid strobe period. The output will

be tri-stated outside of the valid strobe and for the whole frame if no strobe is supplied. When low, the driver and Filter/

Codec are active if PDFDI is low (default).

Rst

When high, a software reset occurs performing the same function as the hardware reset (PWRST) except that the

microport is not affected. A software reset can be removed only by writing this bit low or by a PWRST. When low, the

reset condition is removed.

TxMute

When high the transmit PCM stream is interrupted and replaced with quiet code; thus forcing the output code into a

mute state (only the output code is muted, the transmit microphone and transmit Filter/Codec are still functional). When

low the full transmit path functions normally (default).

RxMute

When high the received PCM stream is interrupted and replaced with quiet code; thus forcing the receive path into a

mute state. When low the full receive path functions normally (default).

TxBsel

When high, the transmit B2 channel is functional in ST-BUS mode. When low, the transmit B1 channel is functional in

ST-BUS mode. Not used in SSI mode.

RxBsel

When high, the receive B2 channel is functional in ST-BUS mode. When low, the receive B1 channel is functional in

ST-BUS mode. Not used in SSI mode.

Control Register 1

ADDRESS = 03h WRITE/READ VERIFY

Power Reset Value

0000 0000

76543210

PDFDI PDDR

TxBsel RxBsel

Rst

_

TxMute RxMute

Note: Bits marked "-" are reserved bits and should be written with logic "0"