M34116 INSTRUCTION SET (continued)

INSTRUCTION 6: M34116 STATUS

The Status instruction can be used to read the contents of the instruction register and of the tone and

melody registers.

Two byte are needed:

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

0

1

0

0

C5

C4

C3

C2

C1

C0

01

10

0

110

y C5–C0: Channel number (0–63)

After sending this instruction a variable number of Read can be sent depending on the type of operation

that performs the channel (conference, transparent, tone, or melody). The first 3 Read, common to all

type of operation, will send on the Data Bus the following data relative to the channel (C5–C0):

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

0

0

0

1

IT

PT

P4

P3

P2

P1

P0

0

0

0

1

AI4

AI3

AI2

AI1

AI0

0

0

0

1

AO4

AO3

AO2

AO1

AO0

Note:

P4–P0 = 0 means that the channel is disconnected so any following data read is meaningless.

P4–P0 = 1 to 29 is the conference number.

P4–P0 = 30 means that the channel operation is Tone or Melody.

P4–P0 = 31 means that the channel operation is transparent connection.

If the channel operation is Tone or Melody (P4 – P0 = 30) then the subsequent Read will send on the

Data Bus the couples of Step/Time:

Control Signal

Data Bus

CS

RD

C/D

WR

D7

D6

D5

D4

D3

D2

D1

D0

0

0

0

1

S17

S16

S15

S14

S13

S12

S11

S10

0

0

0

1

T17

T16

T15

T14

T13

T12

T11

T10

0

0

0

1

S27

S26

S25

S24

S23

S22

S21

S20

0

0

0

1

T27

T26

T25

T24

T23

T22

T21

T20

::

:

::::::

:::

Notes:

–Tone and Melody status reading ends if an all 1’s Step value is found, otherwise the reading is cyclic.

–The minimum time from the rising edge of the WR (with opcode) to the falling edge of first RD is 4clock

periods (6clock periods if E = 1) unless the selected channel has been disconnected. In this case, one

time frame must exist between the disconnect command and the read status command. The RD period

is minimum 4clock periods (6clock periods if E = 1).

– for both modes (M34116 and M116) the minimum time between two successive rising edges of the

WR with opcode (C/D = 1) is 4clock periods (6clock periods if E = 1).

E: Extra bit indication in ”Operating mode” instruction.

M34116

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