pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 20
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pef20550
Manufacturer Part Number
pef20550
Description
Extended Line Card Interface Controller Elic
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF20550.pdf
(407 pages)
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Pin Definitions and Functions (cont’d)
SACCO-Interface
Pin No.
49
50
48
52
44
56
46
54
47
53
45
55
Semiconductor Group
Symbol
HFSA
HFSB
HDCA
HDCB
RxDA
RxDB
TxDA
TxDB
TSCA
TSCB
CxDA
CxDB
Input (I)
Output (O)
I
I
I
I
I
I
O (OD)
O (OD)
O
O
I
I
Function
HDLC-Interface Frame Synchronization
Channel A/B
Frame synchronization pulse in clock mode 2,
data strobe in clock mode 1.
HDLC-Interface Data Clock Channel A/B. Single
or double data rate.
Receive Serial Data HDLC-Channel A/B
The serial data received on this lines is forwarded
into the corresponding HDLC-receive channel.
Data is sampled on the
– falling edge of HDC (CCR2:RDS = 0) or
– rising edge of HDC (CCR2:RDS = 1).
Transmit Serial Data HDLC-Channel A/B.
Data output lines of the corresponding HDLC-
transmit channel. Depending on the bit
CCR1:ODS the pins have push pull or open
drain characteristic. When transmission is
disabled (TSCA or B = 1) or when bit
CCR2:TXDE is reset the pins are in the state
high impedance.
Tristate Control HDLC-Channel A/B, active low.
Supplies a control signal for an external driver.
When low the corresponding TxD-outputs are
valid. The detailed functionality is defined
programming the SACCO-registers
CCR2:SOC1,SOC0. During reset these lines are
high.
Collision Data HDLC-Channel A/B
In a bus configuration, the external serial bus must
be connected to the respective CxD-pin for
collision detection.
In point-to-point configurations the pin provides a
"clear to send" function. When '0'/'1' the transmit
channel is enabled/disabled. If this function is
not needed CxDA/B has to be tied to
20
PEB 20550
PEF 20550
V
Overview
SS
.
01.96
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