40
Am79Q02/021/031 Data Sheet
4.
No Operation
MPI Command
(06h)
5.
Activate Channel (Operational Mode)
MPI Command
(0Eh)
This command places the device in the Active mode and sets CSTAT = 1. No valid PCM data
is transmitted until after the second FS pulse is received following the execution of the Activate
command.
6, 7. Write/Read Transmit Time Slot and PCM Highway Selection
MPI Command
(40/41h)
R/W = 0: Write
R/W = 1: Read
Transmit PCM Highway
TPCM = 0*
Transmit on Highway A (see TAB in Commands 10, 11)
TPCM = 1
Transmit on Highway B (see TAB in Commands 10, 11)
Transmit Time Slot
TTS = 0–127
Time Slot Number (TTS0 is LSB, TTS6 is MSB)
PCM Highway B is not available on the Am79Q021/031 QSLAC devices.
* Power Up and Hardware Reset (RST) Value = 00h, 01h, 02h, 03h for Channels 1, 2, 3, and 4,
respectively.
8, 9. Write/Read Receive Time Slot and PCM Highway Selection
MPI Command
(42/43h)
R/W = 0: Write
R/W = 1: Read
Receive PCM Highway
RPCM = 0*
Receive on Highway A
RPCM = 1
Receive on Highway B
Receive Time Slot
RTS = 0–127
Time Slot Number (RTS0 is LSB, RTS6 is MSB)
PCM Highway B is not available on the Am79Q021 and the Am79Q031 QSLAC devices.
* Power Up and Hardware Reset (RST) Value = 00h, 01h, 02h, 03h for Channels 1, 2, 3, and 4,
respectively.
D7
D6
D5
D4
D3
D2
D1
D0
Command
0
0
0
0
0
1
1
0
D7
D6
D5
D4
D3
D2
D1
D0
Command
0
0
0
0
1
1
1
0
D7
D6
D5
D4
D3
D2
D1
D0
Command
0
1
0
0
0
0
0
R/W
I/O Data
TPCM
TTS6
TTS5
TTS4
TTS3
TTS2
TTS1
TTS0
D7
D6
D5
D4
D3
D2
D1
D0
Command
0
1
0
0
0
0
1
R/W
I/O Data
RPCM
RTS6
RTS5
RTS4
RTS3
RTS2
RTS1
RTS0
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