Introduction

The SEROCCO-H is a Serial Communication Controller with two independent serial channels1). The serial channels are derived from updated protocol logic of the ESCC and DSCC4 device family providing a large set of protocol support and variety in serial interface configuration. This allows easy integration to different environments and applications.

Features

Serial communication controllers (SCCs)

• Two independent channels

• Full duplex data rates on each channel of up to 12.5 Mbit/s sync - 2 Mbit/s with DPLL

• 64 Bytes deep receive FIFO per SCC

• 64 Bytes deep transmit FIFO per SCC

Serial Interface

• On-chip clock generation or external clock sources

• On-chip DPLLs for clock recovery

• Baud rate generator

• Clock gating signals

• Clock gapping capability

• Programmable time-slot capability for connection to TDM interfaces (e.g. T1, E1)

• NRZ, NRZI, FM and Manchester data encoding

• Optional data flow control using modem control lines (RTS, CTS, CD)

• Support of bus configuration by collision detection and resolution

Bit Processor Functions

• HDLC/SDLC Protocol Modes

– Automatic flag detection and transmission

– Shared opening and closing flag

– Generation of interframe-time fill ’1’s or flags

– Detection of receive line status

– Zero bit insertion and deletion

– CRC generation and checking (CRC-CCITT or CRC-32)

– Transparent CRC option per channel and/or per frame

– Programmable Preamble (8 bit) with selectable repetition rate

– Error detection (abort, long frame, CRC error, short frames)

• Bit Synchronous PPP Mode

– Bit oriented transmission of HDLC frame (flag, data, CRC, flag)

– Zero bit insertion/deletion

– 15 consecutive ’1’ bits abort sequence

• Octet Synchronous PPP Mode

– Octet oriented transmission of HDLC frame (flag, data, CRC, flag)

– Programmable character map of 32 hard-wired characters (00H-1FH)

– Four programmable characters for additional mapping

– Insertion/deletion of control-escape character (7DH) for mapped characters

• Extended Transparent Mode

– Fully bit transparent (no framing, no bit manipulation)

– Octet-aligned transmission and reception

• Protocol and Mode Independent

– Data bit inversion

– Data overflow and underrun detection

– Timer

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