PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 236

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Note:
TBA2-0 TIC Bus Address
Note:
ST1
ST0
SC1
SC0
Semiconductor Group
The TSF-bit will be cleared only by a hardware reset.
Defines the individual address for the ISAC-S on the IOM TIC bus
(see chapter 2.4.6).
This address is used to access the C/I and D channel on the IOM.
One device liable to transmit in C/I and D fields on the IOM should always be given
the address value "7".
Synchronous Transfer 1
When set, causes the ISAC-S to generate an SIN interrupt status (ISTA register) at
the beginning of an IOM frame.
Synchronous Transfer 0
When set, causes the ISAC-S to generate an SIN interrupt status (ISTA register) at
the middle of an IOM frame.
Synchronous Transfer 1 Completed
After an SIN interrupt the processor has to acknowledge the interrupt by setting the
SC1-bit before the middle of the IOM frame, if the interrupt was originated from a Syn-
chronous Transfer 1 (ST1). Otherwise an SOV interrupt (EXIR register) will be gene-
rated.
Synchronous Transfer 0 Completed
After an SIN interrupt the processor has to acknowledge the interrupt by setting the
SC0-bit before the start of the next IOM frame, if the interrupt was originated from a
Synchronous Transfer 0 (ST0).
Otherwise an SOV interrupt (EXIR register) will be generated.
– Watchdog Timer
– Subscriber/Exchange Awake (SIP/EAW).
In this case the SIP/EAW line is always an input signal which can serve as a
request signal from the subscriber to initiate the awake function in a terminal.
A falling edge on the EAW line generates an SAW interrupt (EXIR).
When the RSS-bit in the CIX0 register is zero, a falling edge on the EAW line
(Subscriber Awake) or a C/I code change (Exchange Awake) initiates a reset
pulse.
When the RSS-bit is set to one a reset pulse is triggered only by the expiration
of the watchdog timer (see also CIX0 register description).
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Register Description