psb21391 Infineon Technologies Corporation, psb21391 Datasheet - Page 88

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

Data Sheet
2.3.5.2
Instead of using the integrated layer-1 statemachine it is also possible to implement the
layer-1 statemachine completely in software.
The internal layer-1 statemachine can be disabled by setting the L1SW bit in the
TR_CONF0 register (see chapter 7.1.1) to ’1’.
The transmitter is completely under control of the microcontroller via register TR_CMD
(see chapter 7.1.5).
The status of the receiver is stored in register TR_STA (see chapter 7.1.4) and has to
be evaluated by the microcontroller. This register is updated continuously. If not masked
a RIC interrupt (see chapter 7.1.6) is generated by any change of the register contents.
The interrupt is cleared after a read access to this register.
External Layer-1 Statemachine
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PSB 21391
PSB 21393
Interfaces
2001-03-07