PEB2080 SIEMENS [Siemens Semiconductor Group], PEB2080 Datasheet - Page 38

• Manufacturer Part Number: PEB2080
• Description: S/T Bus Interface Circuit(SBC)
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Operational Description
In NT mode the IOM interface is activated by the upstream unit turning on the clocking signals.
Simultaneously the upstream unit must send the desired command in the C/l channel. In the case
where activation is requested from a terminal, the NT SBC first requests timing on the IOM interface
by pulling SDO to a static low level. The SBC enters the power-up state immediately after timing
has been applied. The clock signals may be switched off after the code Deactivation Indication
Downstream has been sent twice by the upstream unit.
Figure 21
Activation of the IOM
®
Interface
Semiconductor Group
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