MT8924AS Zarlink Semiconductor, MT8924AS Datasheet - Page 7

• Manufacturer Part Number: MT8924AS
• Description: MT8924 - PCM Conference Circuit (PCC)
• Manufacturer: Zarlink Semiconductor

Preliminary Information
Instruction 1 : Channel Connection in Conference Mode
Instruction 2 : Channel Connection in Transparent Mode
Instruction 3 : Channel Disconnection
Instruction 4: Overflow Status Monitoring
S:
P3-P0:
IT:
C4-C0:
A1-A0:
T1-T0: see noise suppression description given for Instruction 1
CF10 - CF1 : Conference is in overflow when bit is HIGH
Note : as long as RD remains LOW, the overflow status of the conference selected by C/D can be monitored in real time
CS
CS
CS
CS
0
0
0
0
0
0
0
0
0
Control Signals
Control Signals
Control Signals
Control Signals
RD
RD
RD
RD
1
1
1
1
1
1
1
0
0
C/D
C/D
C/D
C/D
Conference Start Bit
Conference Number (1-10)
Insertion Tone Function Enable (IT=1)
Channel Number (0-31)
Channel Attenuation
0
0
1
0
1
0
1
0
1
00 = -0dB
01 = -3dB
10 = -6dB
WR
WR
WR
WR
0
0
0
0
0
0
0
1
1
D7
D7
D7
D7
CF
A1
A1
X
X
X
X
X
X
8
D6
A0
D6
A0
D6
D6
CF
X
X
X
X
X
X
7
CF
D5
D5
D5
D5
T1
T1
IT
X
X
X
X
X
6
Data Bus
D4
C4
Data Bus
D4
C4
Data Bus
D4
C4
Data Bus
D4
CF
T0
T0
S
X
X
5
D3
C3
D3
C3
D3
C3
D3
CF
P3
X
0
0
1
4
T1-T0:
D2
P2
C2
D2
C2
D2
C2
D2
CF
T1/T0
X
1
0
1
3
00
01
10
11
CF
CF
D1
P1
C1
D1
C1
D1
C1
D1
10
1
1
1
2
Channel Noise Suppression
D0
C0
D0
C0
D0
C0
D0
CF
CF
P0
1
1
1
1
9
A-Law
no noise suppression
9/4096
16/4096
32/4096
Conference Number
PCM Channel Number and
Insertion Tone control
Opcode, Attenuation, and
Noise Suppression control
PCM Channel Number
Opcode and Attenuation
PCM Channel Number
Opcode
Conferences 1 to 8
Conferences 9 to 10
9/8159
16/8159
32/8159
-Law
Comments
Comments
Comments
Comments
MT8924
8-9