psf21911 ETC-unknow, psf21911 Datasheet - Page 20

• Manufacturer Part Number: psf21911
• Description: Isdn Echocancellation Circuit Terminal Applications Iec-q
• Manufacturer: ETC-unknow

Semiconductor Group
IOM
U-Interface Pins
PU: internal pull-up resistor
PD: internal pull-down resistor
Pin No.
P-LCC-44 T-QFP64
31
30
26
27
15
14
6
4
®
-2 Pins
53
52
45
46
29
28
16
13
Symbol
Stand-
alone
DCL
FSC
DIN
DOUT
AIN
BIN
AOUT
BOUT
µP
mode
DCL
FSC
DIN
DOUT
AIN
BIN
AOUT
BOUT
I/O
O
O
I
O
I
I
O
O
20
Function
Data Clock
Data clock output 512 or 1536 kHz
(table 2 on page 26). In µP mode this
pin can be programmed to deliver a bit
clock (256 or 768 kHz).
Frame Synchronization Clock
The start of the B1-channel in time-slot
0 is marked. FSC = (1) for one DCL-
period indicates a superframe marker.
FSC = (1) for at least two DCL-periods
marks a standard frame.
Data In
Input of IOM-2 data synchronous to
DCL-clock (Data upstream direction).
Data Out
Output of IOM-2 data synchronous to
DCL-clock. Open drain or tristate
depending on bit/pin DOD (Data
Downstream direction).
Differential U-Interface Input
Connect to hybrid.
Differential U-Interface Input
Connect to hybrid.
Differential U-Interface Output
Connect to hybrid.
Differential U-Interface Output
Connect to hybrid.
Pin Definitions and Functions
PSB 21911
PSF 21911
11.97