PSF21150 INFINEON [Infineon Technologies AG], PSF21150 Datasheet - Page 109

• Manufacturer Part Number: PSF21150
• Description: IPAC-X ISDN PC ADAPTER CIRCUIT
• Manufacturer: INFINEON [Infineon Technologies AG]

3.7.1.2
IOM-2 Interface
The IOM handler of the IPAC-X provides a flexible access of the B-channel HDLC
controllers to the timeslots on IOM-2 which may be used for IDSL applications.
One of the two B-channel HDCL controllers is programmed to transparent mode and its
FIFO is programmed to certain timeslot on IOM-2, while the second B-channel controller
and the D-channel controller is unused
.
Figure 58
This B-channel HDLC controller is assigned to three timeslots on IOM-2, which are two
8-bit timeslots and one 2-bit timeslot. For each of the 3 timeslots the timeslot position
(timeslot number) and data port (DU, DD) can individually be selected. Additionally, each
of the 3 timeslots can individually be enabled/disabled so any combination of the 3
timeslots can be configured, i.e. during each FSC frame the HDLC/FIFO will access
2 bit, 8 bit, 10 bit, 16 bit or 18 bit.
Some examples for access to IOM timeslots are given in
• Example 1 shows 18-bit access to B1 + B2 + D
• Example 2 shows 10-bit access to B2 + D
• Example 3 shows 10-bit access to B1 + D in channel 1
• Example 4 shows 16-bit access to MON0 + MON1.
Data Sheet
B-channel
HDLC 1
TX/RX FIFOs
Timeslot assignement of FIFO data to IOM-2
timeslots (described in this chapter)
IDSL Support
Timeslot Assignment on IOM-2
B-channel
HDLC 2
TX/RX FIFOs
Host
IOM-2 Interface
D-channel
HDLC
TX/RX FIFOs
(Figure
109
58)
Description of Functional Blocks
S transceiver
Figure
59:
S
PSB 21150
PSF 21150
2000-07-21