m34116 STMicroelectronics, m34116 Datasheet - Page 13

• Manufacturer Part Number: m34116
• Description: Pcm Conference Call And Tone Generation Circuit
• Manufacturer: STMicroelectronics

M116 INSTRUCTION SET
INSTRUCTION 1: CHANNEL CONNECTION IN CONFERENCE MODE
Three byte are needed:
1)The first byte contains the conference number (bits D0–D3) and the Start bit S (bit D4). When S = 1, all
2)The second byte contains in the bits (D0–D4) the number of the channel to be connected and the In-
3) The third byte contains information about the attenuationlevel to be applied to that channel and the
Instruction 1 Format
S: Conference Start bit
P3–P0: Conference number (1–10)
IT: Insertion Tone function enable (IT = 1)
C4–C0: Channel number (0–31)
A1–A0: Channel attenuation
INSTRUCTION 2: CHANNEL CONNECTION IN TRANSPARENT MODE
Two bytes are needed:
1) The first byte contains the number of the channel.
2) The second byte contains information about the attenuation level to be applied to that channel and the
PCM data of this channel is not added to any conference and it is transferred to the PCM output. It is not
affected by the tone control pins.
Instruction 2 Format
INSTRUCTION 3: CHANNEL DISCONNECTION
Two bytes are needed:
1) The first word contains the number of the channel to be disconnected.
2) The second word contains the opcode (1111).
One time frame must exist between disconnection and connection of the same channel.
Instruction 3 Format
00 = – 0dB
01 = – 3dB
10 = – 6dB
registers of the conference will be cleared. S = 1 is only required in the instruction 1 set of the first
channel connected to a new conference.
sert Tone Enable bit IT (D5). When bit IT = 1 all the channels belonging to that conference are en-
abled using insert tone function if it’s active (TD = 1).
opcode (0111).
opcode (0011).
CS
CS
CS
0
0
0
0
0
0
0
Control Signal
Control Signal
Control Signal
RD
RD
RD
1
1
1
1
1
1
1
C/D
C/D
C/D
0
0
1
0
1
0
1
WR
WR
WR
0
0
0
0
0
0
0
D7
A1
D7
A1
D7
X
X
X
X
X
D6
A0
D6
A0
D6
X
X
X
X
X
D5
D5
D5
IT
X
X
X
X
X
X
D4
C4
D4
C4
D4
C4
S
X
X
X
Data Bus
Data Bus
Data Bus
D3
P3
C3
D3
C3
D3
C3
0
0
1
D2
C2
D2
C2
D2
C2
P2
1
0
1
D1
C1
D1
C1
D1
C1
P1
1
1
1
M34116
D0
C0
D0
C0
D0
C0
P0
1
1
1
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