HFC-SP Cologne Chip AG, HFC-SP Datasheet - Page 44

• Manufacturer Part Number: HFC-SP
• Description: Isdn S/t HDLC Basic Rate Controller
• Manufacturer: Cologne Chip AG

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The state machine is stuck to '0' after a reset. Writing a '0' to bit 4 of the STATES register restarts
the state machine.
In this state the HFC-SP sends no signal on the S/T-line and it is not possible to activate it by
incoming INFOx.
NT mode:
The NT state machine does not change automatically from G2 to G3 if the TE side sends INFO3
frames. This transition must be activated each time by bit 7 of the STATES register.
Fix the NT state machine to state G3 when activated (by writing 13h into STATES register). This
prevents deactivation of NT mode S/T interface due to sporadically errors on NT input data.
important!
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Cologne
Chip