Introduction

The SEROCCO-M 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.

特性 Features

Serial communication controllers (SCCs)

? Two independent channels

? Full duplex data rates on each channel of up to 16 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

? Asynchronous PPP Mode

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

– Start/stop bit framing of single character

– 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

? Asynchronous (ASYNC) Protocol Mode

– Selectable character length (5 to 8 bits)

– Even, odd, forced or no parity generation/checking

– 1 or 2 stop bits

– Break detection/generation

– In-band flow control by XON/XOFF

– Immediate character insertion

– Termination character detection for end of block identification

– Time out detection

– Error detection (parity error, framing error)

? BISYNC Protocol Mode

– Programmable 6/8 bit SYN pattern (MONOSYNC)

– Programmable 12/16 bit SYN pattern (BISYNC)

– Selectable character length (5 to 8 bits)

– Even, odd, forced or no parity generation/checking

– Generation of interframe-time fill ’1’s or SYN characters

– CRC generation (CRC-16 or CRC-CCITT)

– Transparent CRC option per channel and/or per frame

– Programmable Preamble (8 bit) with selectable repetition rate

– Termination character detection for end of block identification

– Error detection (parity error, framing error)

? 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

Protocol Support

? Address Recognition Modes

– No address recognition (Address Mode 0)

– 8-bit (high byte) address recognition (Address Mode 1)

– 8-bit (low byte) or 16-bit (high and low byte) address recognition (Address Mode 2)

? HDLC Automode

– 8-bit or 16-bit address generation/recognition

– Support of LAPB/LAPD

– Automatic handling of S- and I-frames

– Automatic processing of control byte(s)

– Modulo-8 or modulo-128 operation

– Programmable time-out and retry conditions

– SDLC Normal Response Mode (NRM) operation for slave

? Signaling System #7 (SS7) support

– Detection of FISUs, MSUs and LSSUs

– Unchanged Fill-In Signaling Units (FISUs) not forwarded

– Automatic generation of FISUs in transmit direction (incl. sequence number)

– Counting of errored signaling units

? Optional DTACK/READY controlled cycles

Microprocessor Interface

? 8/16-bit bus interface

? Multiplexed and De-multiplexed address/data bus

? Intel/Motorola style

? Asynchronous interface

? Maskable interrupts for each channel