PSF21150 INFINEON [Infineon Technologies AG], PSF21150 Datasheet - Page 139

• Manufacturer Part Number: PSF21150
• Description: IPAC-X ISDN PC ADAPTER CIRCUIT
• Manufacturer: INFINEON [Infineon Technologies AG]

3.8
3.8.1
The AUX interface provides various functions, which depend on the operation mode (TE,
LT-T, LT-S, NT or Intelligent NT mode) selected by pins MODE0 and MODE1/EAW (see
Table
by the host.
Table 14
AUX0-5 (TE, Int. NT mode), AUX3-5 (LT-T, LT-S, NT mode)
These pins can be used as programmable I/O lines.
As inputs (AOE.OEx=1) the state at the pin is latched in when the host performes read
operation to register ARX.
As outputs (AOE.OEx=0) the value in register ATX is driven on the pins with a minimum
delay after the write operation to this register is performed. They can be configured as
open drain (ACFG1.ODx=0) or push/pull outputs (ACFG1.ODx=1). The status (’1’ or ’0’)
at output pins can be read back from register ARX, which may be different from the ATX
value, e.g. if another device drives a different level.
FBOUT
AUX5 is multiplexed with the selectable FSC/BCL output FBOUT, i.e. the host can select
either standard I/O characteristic (ACFG2.A5SEL=0, default) or FBOUT functionality
(ACFG2.A5SEL=1). FBOUT provides either an FSC (ACFG2.FBS=0, default) or BCL
signal (ACFG2.FBS=1) which are derived from the DCL clock (also see
Data Sheet
Pin
AUX0
AUX1
AUX2
AUX3
AUX4
AUX5
AUX6
AUX7
14). After reset the pins are switched as inputs until further configuration is done
Auxiliary Interface
Mode Dependent Functions
AUX Pin Functions
TE, Int. NT mode
AUX0 (i/o)
AUX1 (i/o)
AUX2 (i/o)
AUX3 (i/o)
AUX4 (i/o) / MBIT
AUX5 (i/o) / FBOUT (o)
INT0 (i/o)
INT1 (i/o) / SGO (o)
139
LT-T, LT-S, NT mode
CH0 (i)
CH1 (i)
CH2 (i)
AUX3 (i/o)
AUX4 (i/o) / MBIT
AUX5 (i/o) / FBOUT (o)
INT0 (i/o)
INT1 (i/o) / SGO (o)
Description of Functional Blocks
Chapter
PSB 21150
PSF 21150
2000-07-21
3.4).