PEB20534H-10 SIEMENS [Siemens Semiconductor Group], PEB20534H-10 Datasheet - Page 47

• Manufacturer Part Number: PEB20534H-10
• Description: DMA Supported Serial Communication Controller with 4 Channels DSCC4
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Table 5
Pin No.
176
177
80
91
172
183
Note: A value of 4.7k is recommended for all Pull-Down/Pull-Up resistors to V
Semiconductor Group
This recommendation applies to Table 2 to Table 5.
Symbol
CD0
CD1
CD2
CD3
or
FSC0
FSC1
FSC2
FSC3
or
RCG0
RCG1
RCG2
RCG3
XTAL1
XTAL2
Serial Communication Controller (SCC) Signals (cont’d)
Input (I)
Output (O)
I
I
(O)
Function
Carrier Detect
The function of this pin depends on the
selected clock mode.
It can supply
– either a modem control or a general
– or a receive strobe signal ( clock mode 1).
Additionally, an interrupt may be issued if a
state transition occurs at the CDn pin
(programmable feature).
A Pull-Down resistor to V
recommended if CD is not used.
Frame Synchronization
When SCCn is in time-slot mode (e.g. PCM
mode) these pins supply the Frame
Synchronization inputs (clock mode 5).
Receive Clock Gating
In clock mode 4 these pins are used as
Receive Clock Gating signals.
Crystal Connection
If the internal oscillator is used for clock
generation (clock mode 0b, 6, 7) the external
crystal has to be connected to these pins.
Moreover, XTAL1 may be used as common
clock input for all SCCs provided by an
external clock generator (oscillator).
A Pull-Down resistor to V
recommended if XTAL1 is not used.
47
purpose input (clock modes 0, 2, 3, 6, 7). If
auto-start is programmed, it functions as a
receiver enable signal.
SS
SS
Pin Descriptions
is
is
Data Sheet 09.98
PEB 20534
DD3
/V
SS
.