PEB20534H-10 SIEMENS [Siemens Semiconductor Group], PEB20534H-10 Datasheet - Page 281
PEB20534H-10
Manufacturer Part Number
PEB20534H-10
Description
DMA Supported Serial Communication Controller with 4 Channels DSCC4
Manufacturer
SIEMENS [Siemens Semiconductor Group]
Datasheet
1.PEB20534H-10.pdf
(442 pages)
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Semiconductor Group
SYNC
RFNE
CD
RLI
Synchronization Status
Indicates whether the receiver is in synchronized state. After a ’HUNT’
command ’SYNC’ bit is cleared and the receiver starts searching for a
SYNC character. When found the ’SYNC’ status bit is set immediately,
an SCD-interrupt is generated (if enabled) and receive data is forwarded
to the receive FIFO.
SYNC=’0’
SYNC=’1’
(SCC) Receive FIFO Not Empty
This status bit is set if the SCC receive FIFO stores at least one valid
byte which might be not transferred to the central RFIFO because the
programmed threshold level is not exceeded and no frame end/ block
end condition is generated.
RFNE=’0’
RFNE=’1’
CD (Carrier Detect) Input Signal State
CD=’0’
CD=’1’
Receive Line Inactive
This bit indicates that neither flags as interframe time fill nor data are
received via the receive line.
RLI=’0’
RLI=’1’
Synchronization is lost or not yet achieved.
(after reset, after new ’HUNT’ command has been issued
before SYNC character is found)
The receiver is in synchronized state.
SCC receive FIFO is empty.
SCC receive FIFO is not empty.
CD input signal is inactive (low level)
CD input signal is active (high level)
Receive line is active, no constant high level is detected.
Receive line is inactive, i.e. more than 7 consecutive ’1’
are detected on the line.
281
Detailed Register Description
(async/bisync modes)
Data Sheet 09.98
(bisync mode)
PEB 20534
(hdlc mode)
(all modes)
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