peb2035 ETC-unknow, peb2035 Datasheet - Page 134

• Manufacturer Part Number: peb2035
• Description: Communications Advanced Cmos Frame Aligner
• Manufacturer: ETC-unknow

Important Remarks
Semiconductor Group
External Multiframe Synchronization
The transmitter of the ACFA can be synchronized externally for multiframe begin (port XCHPY,
bit ACR.EXMF). This feature is required if the bit-robbed signals are routed through the switching
network and are inserted in transmit direction via the system interface.
Wander Compensation
In receive direction and channel translation mode 0 the ACFA compensates wander with the
maximum wander amplitude of 142 UI peak to peak if enabled via bit ACR.SLM.
Code Violation Counter Extension
The counter CVC can be switched to 10-bit length via bit EMOD.ECVE (status bits CECX.CV8
and CECX.CV9).
Full Bauded Mode
Output pins XDOP, XDOM can be switched to full bauded mode via bit EMOD.XFB.
Extended DMA Mode
DMA request lines RREQ, XREQ remain active until the third read/write access to the assigned
stack is provided (bit EMOD.EDMA).
Disable AIS to System Interface
Automatic transmission of AIS to system internal highway (RDO) during asynchronous state can
be disabled via bit EMOD.DAIS. However, it remains programmable via bit CCR.SAIS.
Corrections: generation of signal XREQ.
Unused control bits have to be programmed with a logical ‘0’, although they are set to logical ‘1’
when reading the assigned registers.
In contrast to the Preliminary Delta Sheet 03.90. status bits CECX.CV8 and CECX.CV9 occupy
bit positions 4 and 5 of register CECX.
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PEB 2035