PEB 2091
PEF 2091
Functional Description
FSC
PI
IOM R -2
U
IOM R -2
U
ITS10193
Figure 15
Stand-Alone Mode (left) and µP Mode (right)
In µP mode B channels, D channel, C/I codes and Monitor commands can either be
passed between the U transceiver and IOM®-2 directly, or they can be looped through
the µP via the PI. Any selection of "passed" or "looped" channels can be programmed
via a control register.
3.2
Setting Operating Modes
Mode setting of the PEB/F 2091 V5.3 will be described in several subsections below.
This includes setting basic operation modes (e.g. LT, NT, Repeater), as well as setting
special operating modes, i.e. test modes, DOUT driver modes, IOM®-2 enable/disable,
EOC Auto/Transparent and monitor time-out on/off.
Setting operation modes of the PEB/F 2091 V5.3 will be different in stand-alone and in
µP mode. These two cases will be distinguished.
3.2.1
Basic Operating Mode
µP Mode
In µP mode a microprocessor interface gives access to the configuration registers. The
basic operating mode is selected via bits STCR:BURST,LT, TS2,TS1,TS0, according to
Table 2, page 51 . The STCR register is described on page 212.
Stand-Alone Mode
In stand-alone mode the operating mode is selected via pin strapping of pins LT, Burst,
TS2, TS1 and TS0 according to Table 2, page 51. It is possible to change the mode of
a device during operation (e.g. for test purposes) if the mode change is followed by a
reset.
Semiconductor Group
50
Data Sheet 01.99
INFINEON [ Infineon ]
