MT9094 Mitel Networks Corporation, MT9094 Datasheet - Page 14

• Manufacturer Part Number: MT9094
• Description: ISO2-CMOS ST-BUS FAMILY Digital Telephone (DPhone-II)
• Manufacturer: Mitel Networks Corporation

MT9094
Note: Bits marked "-" are reserved bits and should be written with logic "0".
7-58
Transducer Control Register
General Control Register
PuFC
Tfhp
DIAL EN
SIDE EN
MIC EN
MIC/HNSTMIC
SPKR EN
HSSPKR EN
RST
DATASEL
A/u
Sign-mag/CCITT When high, sign-magnitude bit coding is selected, When low, true CCITT PCM coding is selected.
RxA/u
MICA/u
SIDEA/u
NCT EN
PuFC
RST
7
7
When high, the handset speaker driver is powered up. When low, this driver is powered down.
When high, the Filter/CODEC is powered up. When low, the Filter/CODEC is powered down. If PuFC, SPKR EN and
HSSPKR EN are all low then the VRef/VBias circuit is also powered down.
When high, an additional high pass function (passband beginning at 400Hz) is inserted into the transmit path. When
low, this highpass filter is disabled.
When high, a first order lowpass filter is inserted into the receive path (3dB = 1kHz). When low, this lowpass filter is
disabled.
When high, the sidetone path is enabled (assuming STG
When high, the selected transmit microphone is enabled to the transmit filter section. When low, the microphone
path is muted.
When high, the handsfree microphone (pins MIC±) is muxed into the transmit path. When low, the handset
microphone (pins M±) is muxed into the transmit path. Both are contingent on "MIC EN".
When high, the handsfree loudspeaker driver is powered up. When low, this driver is powered down.
Active high reset. Performs the same function as PWRST but does not affect the microport or the watchdog circuits.
To remove this reset a PWRST must occur or this bit must be written low.
When high, the microport transmit and receive are performed on separate pins. DATA1 is receive while DATA2 is
transmit. When low, the microport conforms to Intel MCS-51 mode 0 specifications; DATA1 is a bi-directional
(transmit/receive) serial data pin while DATA2 is internally disconnected and tri-stated.
When high, A-Law (de)coding is selected. When low, µ-Law (de)coding is selected.
When high, the receiver driver nominal gain is set at -9.7 dB. When low this driver nominal gain is set at -12.3 dB.
When high, the transmit amplifier nominal gain is set at 15.4 dB. When low this amplifier nominal gain is set at 6.1
dB.
When high, the side-tone nominal gain is set at -18.8 dB. When low this nominal gain is set at -11 dB.
When high, the new call tone generator output from the DSP is selected as the source for the loudspeaker path.
When low, the CODEC output is selected for the loudspeaker path. Note that SPKR EN must also be set high for
new call tone to function.
Tfhp
DATA
SEL
6
6
DIAL
EN
A/
5
5
Sign-Mag/
SIDE
CCITT
EN
4
4
MIC
EN
A/
3
Rx
3
HNSTMIC
MIC/
MIC
A/
2
2
2-0
are not all low). When low, the sidetone path is disabled.
SPKR
Side
A/
EN
1
1
ADDRESS = 0Eh WRITE/READ VERIFY
ADDRESS = 0Fh WRITE/READ VERIFY
HSSPKR
NCT
EN
EN
0
0
ADDRESS 10h is RESERVED
Power Reset Value
Power Reset Value
0000 0000
0000 0000