PEF20525 INFINEON [Infineon Technologies AG], PEF20525 Datasheet - Page 145
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PEF20525
Manufacturer Part Number
PEF20525
Description
2 Channel Serial Optimized Communication Controller for HDLC/PPP
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PEF20525.pdf
(252 pages)
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Data Sheet
DIV
ODS
ICD
RTS
Data Inversion
This bit is only valid if NRZ data encoding is selected via bit field SC(2:0)
in register CCR0H.
DIV=’0’
DIV=’1’
Output Driver Select
The transmit data output pin TxD can be configured as push/pull or open
drain output chracteristic.
ODS=’0’
ODS=’1’
Invert Carrier Detect Pin Polarity
ICD=’0’
ICD=’1’
Request To Send Pin Control
The request to send pin RTS can be controlled by SEROCCO-H as an
output autonomously or via setting/clearing bit ’RTS’.
This bit is not valid in clock mode 4.
RTS=’0’
RTS=’1’
No Data Inversion.
Data is transmitted/received inverted (on a per bit basis).
In HDLC and HDLC Synchronous PPP modes the
continuous ’1’ idle sequence is NOT inverted. Thus it is
recommended to select the flag sequence for interframe
time fill transmission (CCR2H:ITF = ’1’), which is inverted.
TxD pin is open drain output.
TxD pin is push/pull output.
Carrier Detect (CD) input pin is active high.
Carrier Detect (CD) input pin is active low.
Pin RTS (output) pin is controlled by SEROCCO-H
autonomously.
RTS is activated during transmission. In bus configuration
mode the functionality depends on bit field ’SOC’ setting.
Note: For autonomous RTS pin control a transmit clock is
Pin RTS can be controlled by software. The output level of
this pin depends on bit ’FRTS’.
necessary.
5-145
Register Description (CCR1H)
PEB 20525
PEF 20525
2000-09-14
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