psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 55

• Manufacturer Part Number: psb21391
• Description: Siemens Codec With Upn Transceiver
• Manufacturer: Infineon Technologies Corporation

The MONITOR channel can be used in following applications which are illustrated in
figure 25:
• As a master device the SCOUT can program and control other devices attached to
• As a slave device the codec and the transceiver part of the SCOUT is programmed
• For data exchange between two microcontroller systems attached to two different
2.2.4.1
The MONITOR channel operates on an asynchronous basis. While data transfers on the
bus take place synchronized to frame sync, the flow of data is controlled by a handshake
procedure using the MONITOR Channel Receive (MR) and MONITOR Channel
Transmit (MX) bits. Data is placed onto the MONITOR channel and the MX bit is
activated. This data will be transmitted once per 8-kHz frame until the transfer is
acknowledged via the MR bit.
Data Sheet
the IOM-2 which do not need a microcontroller interface e.g. ARCOFI-BA PSB 2161.
This facilitates redesigning existing terminal designs in which e.g. an interface of an
expansion slot is realized with IOM-2 interface and monitor programming.
and controlled from a master device on IOM-2 (e.g. JADE PSB 7238). This is used in
applications where no microcontroller is connected directly to the SCOUT. The HDLC
controlling is processed by the master device therefore the HDLC data is transferred
via IOM-2 interface directly to the master device.
devices on one IOM-2 backplane. Use of the MONITOR channel avoids the necessity
of a dedicated serial communication path between the two systems. This simplifies the
system design of terminal equipment.
Handshake Procedure
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PSB 21391
PSB 21393
Interfaces
2001-03-07