INSTRUCTION SET

OPERATING MODES

Two different operating mode istructions are available:

M116 Operating Mode:

Sending this operating mode instruction, the device functionality is the same as M116 and M116 instruc-

tion set is selected (refer to the following M116 instruction set for further details).

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

01

10

X

E

F1

F0

0

101

y E = 1 extra bit

y F1– F0 = 00 no bit inverted

01 even bit inverted

10 odd bit inverted

11 all bit inverted

Default values after reset:

E = 0

F1– F0 = 11 if MU Law

F1– F0 = 01 if A Law

M34116 Operating Mode:

Sending this operating mode instruction, the M34116 instruction set and functionality are selected

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

01

10

X

E

F1

F0

1

001

yE = 1 extra bit

yF1– F0 =

00 no bit inverted

01 even bit inverted

10 odd bit inverted

11 all bit inverted

Note:

Upon reset M116 instruction set is automatically

selected. To switch from the M116 instruction set

the above M34116 operating mode instruction is

necessary. The operating mode instruction, when

necessary, must be sent just after reset.

M34116 INSTRUCTION SET.

INSTRUCTION 1: M34116 CHANNEL CONNECTION IN CONFERENCE MODE

Five bytes are needed:

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

0

X

X

S

P4P3

P2P1P0

0

1

0

0

X

X

X

Al4

Al3

Al2

Al1

Al0

0

1

0

0

X

X

X

AO4

AO3

AO2

AO1

AO0

0

1

0

0

X

PTC5C4C3

C2C1C0

01

10

X

X

X

X

0

111

y S: Start bit

y Al4–Al0:

Al4 = 1

Al4 = 0

Al3–Al0

Input attenuationor gain (

±15dB)

gain

attenuation

value in dB (0–15)

y Ol4–AO0:

AO4 = 1

AO4 = 0

AO3–AO0

output attenuation or gain (

±15dB)

gain

attenuation

value in dB (0–15)

y PT: Phase toggle conference

y P4–P0: Conference number (1–29)

y C5–C0: Channel number (0–63)

When S = 1 the conference register is cleared.

S = 1 can be used only when connecting the first

channel to a new conference.

When PT = 1 the sign of the PCM samples is

changed before they are put in conference. This

corresponds to a phase shift of 180

° and may be

used to reduce the electrical echo.

Note: Unspecified Data Bus can be either 0’s or 1’s

M34116

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