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| 型號(hào)： | MPC823UM_REV1_16-CPM7 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 10 AMP SUBMINIATURE POWER RELAY |
| 中文描述： | 通信處理器模塊 |
| 文件頁(yè)數(shù)： | 45/74頁(yè) |
| 文件大小： | 234K |
| 代理商： | MPC823UM_REV1_16-CPM7 |
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Communication Processor Module
MOTOROLA
MPC823 REFERENCE MANUAL
16-423
S
C
1
P
To use the SMCx GCI channels properly, the time-slot assigner in the serial interface must
be configured to route the monitor and circuit interface channels to the serial management
controller you prefer. Refer to
Section 16.7 The Serial Interface with Time-Slot Assigner
for more details on how to program this configuration. A serial management controller in GCI
mode is also referred to as the SMCx GCI controller.
16.11.8.0.1 SMCx GCI Monitor Channel Transmission Process.
The monitor channel 0
is used to exchange data with a layer 1 device (reading and writing internal registers and
transferring the S and Q bits). Monitor channel 1 is used for programming and controlling
voice/data modules, such as CODECs. The core writes the data byte into the transmit (TX)
buffer descriptor. The serial management controller transmits the data on the monitor
channel and handles the A and E control bits according to the GCI monitor channel protocol.
You can issue the
TIMEOUT
command to solve deadlocks when errors in the A and E bit
occur on the data line.
16.11.8.0.2 SMCx GCI Monitor Channel Reception Process.
The serial management
controller receives data and handles the A and E control bits according to the GCI monitor
channel protocol. When the communication processor module stores a received data byte
in the SMCx receive (RX) buffer descriptor, a maskable interrupt is generated. You can
issue the
TRANSMIT ABORT REQUEST
command and the MPC823 transmits an abort
request on the E bit.
16.11.8.1 HANDLING THE SMCx CIRCUIT INTERFACE CHANNEL.
The circuit interface
channel is used to control the layer 1 device. The layer 2 device in the TE sends commands
and receives indication to or from the upstream layer 1 device via circuit interface channel
0. In the SCIT configuration, circuit interface channel 1 is used to convey real-time status
information between the layer 2 device and nonlayer 1 peripheral devices (CODECs).
16.11.8.1.1 SMCx GCI Circuit Interface Channel Transmission Process.
The core
writes the data byte into the circuit interface TX buffer descriptor and the serial management
controller transmits the data continuously on the circuit interface channel to the physical
layer device.
16.11.8.1.2 SMCx GCI Circuit Interface Channel Reception Process.
The SMCx
receiver continuously monitors the circuit interface channel and when it recognizes a
change in the data and this value is received in two successive frames, it is interpreted as
valid data. This is referred to as the double last-look method. The received data byte is
stored by the communication processor module in the circuit interface RX buffer descriptor
and a maskable interrupt is generated. If the serial management controller is configured to
support SCIT channel 1, the double last-look method is not used.
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