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參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 34/74頁 |
| 文件大小： | 234K |
| 代理商： | MPC823UM_REV1_16-CPM7 |
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Communication Processor Module
16-412
MPC823 REFERENCE MANUAL
MOTOROLA
S
C
1
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16.11.7.6 SMCx TRANSPARENT CONTROLLER PARAMETER RAM MEMORY MAP.
There is no protocol-specific parameter RAM for the SMCx Transparent controller. Only the
general SMCx parameter RAM is used. See
Section 16.11.4 SMC General Parameter
RAM Memory Map
for more information.
16.11.7.7 SMCx TRANSPARENT COMMANDS.
You can program the CPCR (described
in
Section 16.2.6.1 CPM Command Register
) with the following commands to transmit
data.
STOP TRANSMIT
—After the hardware or software is reset and the channel is enabled
in the SMCM–Transparent register, the channel is in transmit enable mode and starts
polling the first buffer descriptor in the table. This command disables the transmission
of frames on the transmit channel. If the transparent controller receives this command
while transmitting a frame, it stops after the contents of the FIFO are transmitted (up to
2 characters). The TBPTR is not advanced to the next buffer descriptor, no new buffer
descriptor is accessed, and no new buffers are transmitted for this channel. The
transmitter sends idles until the
RESTART TRANSMIT
command is issued.
RESTART TRANSMIT
—This command is used to begin or continue transmission from
the current TBPTR in the channel’s TX buffer descriptor table. When the channel
receives this command, it starts polling the R bit in the TX buffer descriptor. A serial
management controller expects this command after a
STOP TRANSMIT
command is
issued and the channel in the SMCMR is disabled or after a transmitter error occurs.
INIT TX PARAMETERS
—This command initializes all the transmit parameters in this
serial channel parameter RAM to their reset state and must only be issued when the
transmitter is disabled. The
INIT TX AND RX PARAMS
command can also be used to
reset the transmit and receive parameters.
You can program the CPCR with the following commands to receive data.
ENTER HUNT MODE
—This command forces a serial management controller to close
the current receive buffer descriptor if it is currently being used and to use the next
buffer descriptor in the list for any subsequently received data. If a serial management
controller is not in the process of receiving data, the buffer is not closed. Additionally,
this command causes the receiver to wait for a resynchronization before further
reception continues.
CLOSE RX BD
—This command is used to force a serial management controller to
close the current receive buffer descriptor if it is being used and to use the next buffer
descriptor in the list for any subsequently received data. If a serial management
controller is not in the process of receiving data, no action is taken by this command.
INIT RX PARAMETERS
—This command initializes all the receive parameters in this
serial channel’s parameter RAM to their reset state. It must only be issued when the
receiver is disabled. The
INIT TX AND RX PARAMS
command can also be used to
reset the receive and transmit parameters.
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