psf21911 ETC-unknow, psf21911 Datasheet - Page 36

• Manufacturer Part Number: psf21911
• Description: Isdn Echocancellation Circuit Terminal Applications Iec-q
• Manufacturer: ETC-unknow

PSB 21911
PSF 21911
IOM®-2 Interface
Monitor Procedure ’Timeout’
The U-transceiver offers an automatic reset (Monitor procedure “Timeout”) for the
Monitor routine. This reset function transfers the Monitor channel into the idle state (MR
and MX set to high) by issuing “EOM” (End of Message) after a timer has elapsed. As
an effect, unacknowledged Monitor messages sent by the U-transceiver are taken away
from the Monitor channel.
The U-transceiver checks for unacknowledged Monitor messages every 5 ms. In case
the timer expires “EOM” will be issued. The U-transceiver does not repeat the message,
hence it will be lost.
In slow applications e.g. testing or evalution platforms this internal reset function may be
disabled by setting
– Pin MTO in stand-alone mode
– Bit ADF2:MTO in µP mode.
If Monitor Timeout is disabled, no restrictions regarding the time for completing a Monitor
transfer exists.
Semiconductor Group
36
11.97