PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 39

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Pin No.
P-LCC-44
2.2.1.8
Not
available
Not
available
2.2.1.9
29
20
Semiconductor Group
Miscellaneous Function Pins
Test Pins
Pin No.
T-QFP64
M-QFP64
64
42
51
37
Symbol
ICE
SG
TP
TP1
Input (I)
Output (O)
I
O
I
I
39
Function
IOM
In IOM
’0’: no FSC and DCL clocks are output.
Clocks may be applied to pins FSC and
DCL. However, they are ignored by the
IEC-Q. Data on pin DIN is ignored. Pin
DOUT is ’floating’.
’1’: Behavior as in former versions of
the IEC-Q. The IOM
and DCL are output on the
corresponding pins.
Due to an internal 100kOhm pull-up
resistor this is the default configuration
after reset if pin ICE is not connected.
This pin can be overridden by the bit
ADF2:ICEC. For more information
see "IOM®-2 Enable/Disable Mode",
page 53.
In IOM
Connect to VDD or leave open.
Internal pull up.
Undefined in stand-alone mode.
Leave it open
Test pin: Not available to user. Do not
connect. Internal pull-down resistor.
Test pin: Not available to user. Do not
connect. Internal pull-down resistor.
®
-2 Clocks Enable
®
®
-2 Master modes:
-2 Slave modes:
®
Pin Descriptions
-2 clocks FSC
Data Sheet 01.99
PEB 2091
PEF 2091