psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 114

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

Data Sheet
3.7
The following test and diagnostic functions for the D-channel are available:
– Digital loop via TLP (Test Loop, TMH register) command bit (figure 58): The TX path
– Test of layer-2 functions while disabling all layer-1 functions and pins associated with
Figure 58
Layer 2 Test Loops
of layer 2 is internally connected with the RX path of layer 2. The output from layer 1
on DD is ignored. This is used for testing layer 2 functionality excluding layer 1
(loopback between XFIFO and RFIFO).
them (including clocking) via bit TR_CONF0.DIS_TR. The HDLC controller and codec
part can still operate via IOM-2. DCL and FSC pins become input.
Test Functions
104
HDLC Controller
PSB 21391
PSB 21393
2001-03-07