MC68360RC25K Freescale Semiconductor, MC68360RC25K Datasheet - Page 499
MC68360RC25K
Manufacturer Part Number
MC68360RC25K
Description
IC MPU QUICC 25MHZ 241-PGA
Manufacturer
Freescale Semiconductor
Datasheets
1.MC68EN360VR25L.pdf
(14 pages)
2.MC68EN360VR25L.pdf
(2 pages)
3.MC68360AI25L.pdf
(962 pages)
Specifications of MC68360RC25K
Processor Type
M683xx 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
241-PGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
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The receive errors (overrun, nonoctet aligned frame, CD lost, aborted frame, and CRC error)
are reported through the Rx BD. The transmit errors (underrun and CTS lost) are reported
through the Tx BD.
7.10.17.6 HDLC COMMAND SET. The following transmit and receive commands are
issued to the CR.
7.10.17.6.1 Transmit Commands. The following paragraphs describe the HDLC transmit
commands.
STOP TRANSMIT Command . After a hardware or software reset and the enabling of the
channel in the SCC mode register, the channel is in the transmit enable mode and starts
polling the first BD in the table every 64 transmit clocks (immediately if the TOD bit in the
TODR is set).
The channel STOP TRANSMIT command disables the transmission of frames on the trans-
mit channel. If this command is received by the HDLC controller during frame transmission,
transmission is aborted after a maximum of 64 additional bits are transmitted, and the trans-
mit FIFO is flushed. The TBPTR is not advanced, no new BD is accessed, and no new
frames are transmitted for this channel. The transmitter will transmit an abort sequence con-
sisting of 01111111 (if the command was given during frame transmission) and then begin
to transmit flags or idles, as indicated by the HDLC mode register.
GRACEFUL STOP TRANSMIT Command . The channel GRACEFUL STOP TRANSMIT
command is used to stop transmission in an orderly way rather than abruptly, as performed
by the regular STOP TRANSMIT command. It stops transmission after the current frame has
completed transmission, or immediately if there is no frame being transmitted. The GRA bit
in the SCCE will be set once transmission has stopped. After transmission ceases, the
HDLC transmit parameters, including BDs, may be modified. The TBPTR will point to the
next Tx BD in the table. Transmission will begin once the R-bit of the next BD is set and the
RESTART TRANSMIT command is issued.
RESTART TRANSMIT Command . The RESTART TRANSMIT command enables the trans-
mission of characters on the transmit channel. This command is expected by the HDLC con-
troller after a STOP TRANSMIT command, after a STOP TRANSMIT command and
disabling the channel in its SCC mode register, after a GRACEFUL STOP TRANSMIT com-
mand, or after a transmitter error (underrun or CTS lost when no automatic frame retrans-
mission is performed). The HDLC controller will resume transmission from the current
TBPTR in the channel’s Tx BD table.
INIT TX PARAMETERS Command . This command initializes all transmit parameters in this
serial channel’s parameter RAM to their reset state. This command should only be issued
If the MFF bit in the PSMR is set, then it is possible for one or
more small frames to be flushed from the transmit FIFO. To
avoid this, the GRACEFUL STOP TRANSMIT command may be
used.
Freescale Semiconductor, Inc.
For More Information On This Product,
MC68360 USER’S MANUAL
Go to: www.freescale.com
NOTE
Serial Communication Controllers (SCCs)
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