m34116 STMicroelectronics, m34116 Datasheet - Page 12

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

M34116
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:
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):
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:
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
– for both modes (M34116 and M116) the minimum time between two successive rising edges of the
12/23
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).
C5–C0: Channel number (0–63)
WR with opcode (C/D = 1) is 4clock periods (6clock periods if E = 1).
E: Extra bit indication in ”Operating mode” instruction.
CS
CS
CS
0
0
0
0
0
0
0
0
0
:
Control Signal
Control Signal
Control Signal
RD
RD
RD
1
1
0
0
0
0
0
0
0
:
C/D
C/D
C/D
0
1
0
0
0
0
0
0
0
:
WR
WR
WR
0
0
1
1
1
1
1
1
1
:
S17
T17
S27
T27
D7
D7
D7
IT
:
S16
T16
S26
T26
D6
D6
PT
D6
:
S15
S25
T15
T25
D5
C5
D5
D5
:
AO4
S14
S24
T14
T24
AI4
D4
C4
D4
P4
D4
:
Data Bus
Data Bus
Data Bus
AO3
S13
S23
T13
T23
AI3
D3
C3
D3
P3
D3
0
:
AO2
S12
T12
S22
T22
AI2
D2
C2
D2
D2
P2
1
:
AO1
S11
T11
S21
T21
AI1
D1
C1
D1
D1
P1
1
:
AO0
S10
T10
S20
T20
AI0
D0
C0
D0
D0
P0
0
: