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

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.

2)The second byte contains in the bits (D0–D4) the number of the channel to be connected and the In-

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).

3) The third byte contains information about the attenuationlevel to be applied to that channel and the

opcode (0111).

Instruction 1 Format

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

0

X

X

X

S

P3

P2

P1

P0

0

1

0

0

X

X

IT

C4

C3

C2

C1

C0

01

10

A1

A0

X

X

0

111

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

00 = – 0dB

01 = – 3dB

10 = – 6dB

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

opcode (0011).

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

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

0

X

X

X

C4C3

C2C1C0

01

10

A1

A0

X

X

0

011

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

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

0

X

X

X

C4C3

C2C1C0

01

10

X

X

X

X

1

111

M34116

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