user manual

6. SCC GENERAL INFORMATION
The Serial Communications Controller (SCC) is a dual channel, multi-protocol data
communications peripheral. The MPA-100 provides a single channel for communications,
however, to provide full DMA capabilities with complete modem control line support, both
channels of the SCC can be utilized. The SCC can be software configured to satisfy a wide
variety of serial communications applications. Some of its protocol capabilities include:
1) Asynchronous Communications
 5, 6, 7, or 8 bits per character
 1, 1-1/2, or 2 stop bits
 Odd, even, or no parity
 Times 1, 16, 32, or 64 x clock modes
 Break generation and detection
 Parity, overrun and framing error detection
2) Byte-oriented Synchronous Communications
 Internal/external character synchronization
 1 or 2 sync characters in separate registers
 Automatic Cyclic Redundancy Check (CRC) generation/detection
3) SDLC/HDLC (Bit Synchronous) Communications
 Abort sequence generation and checking
 Automatic zero insertion and deletion
 Automatic flag insertion between messages
 Address field recognition
 I-field residue handling
 CRC generation and detection
 SDLC loop mode with EOP recognition/loop entry and exit
4) NRZ, NRZI, or FM encoding/decoding
MPA-100 User's Manual 6-1