MT9196 Mitel Semiconductor, MT9196 Datasheet - Page 19

• Manufacturer Part Number: MT9196
• Description: Integrated Digital Phone Circuit (IDPC)
• Manufacturer: Mitel Semiconductor

Preliminary Information
Note: Bits marked "-" are reserved bits and should be written with logic "0".
Control Register 1
Control Register 2
PD
Tfhp
DialEN
B2/B1
RxMUTE
TxMUTE
RST
A/µ
Smag/CCITT
RxINC
TxINC
RST
PD
When high, the crystal oscillator and FDI blocks are powered down. When low, the oscillator and FDI circuits are active.
When High, an additional highpass function (passband beginning at 400 Hz) is inserted into the transmit path. When
When high, a first order lowpass filter is inserted into the receive path (3dB = 1kHz). When low, this lowpass filter is
When high, the receive Filter/CODEC operates on the B2-Channel. When low, the receive Filter/CODEC operates on
When high the received PCM stream is interrupted and replaced with quiet code; thus forcing the receive path into a
When high the transmit PCM stream is interrupted and replaced with quiet code; thus forcing the output code into a
low, this highpass filter is disabled.
disabled.
the B1-Channel. This control bit has significance only for ST-BUS operation and is ignored for SSI operation.
mute state. When low the full receive path functions normally.
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.
7
7
When high, a software reset occurs performing the same function as the hardware reset (PWRST) except that the
When high, A-Law (de)coding is selected for the Filter/CODEC and DTMF generator circuits. When low, µ-Law
When high, sign-magnitude code assignment is selected for the CODEC input/output. When low, CCITT code
When high, the receiver driver nominal gain is set at -9.6dB. When low, this driver nominal gain is set at -12.1dB.
When high, the transmit amplifier nominal gain is set at 15.3dB. When low, this amplifier nominal gain is set at 6.0dB.
microport and watchdog circuitry are 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.
(de)coding is selected for these circuits.
assignment is selected for the CODEC input/output; true sign, inverted magnitude (µ-Law) or true sign, alternate digit
inversion (A-Law).
Tfhp
-
6
6
DialEN
A/
5
5
Smag/
CCITT
4
4
-
RxINC
3
3
-
B2/B1 RxMute TxMute
TxINC
2
2
1
-
1
ADDRESS = 0Eh WRITE/READ VERIFY
ADDRESS = 0Fh WRITE/READ VERIFY
0
0
-
ADDRESS = 0Dh RESERVED
Power Reset Value
Power Reset Value
100X X000
0X00 00XX
MT9196
7-145