PCM-ESCC Dual Channel Multiprotocol, Serial I/O PC/104 MODULE FEATURES � Two independent, full-duplex serial channels � Asynchronous and synchronous (BISYNC, SDLC, HDLC, and CCITT-X.25) protocols supported � RS-232 and optional RS-485/422 electrical interface levels on both channels � Asynchronous mode supported with: • 5-, 6-, 7- or 8-bit character lengths  Even, odd, or no parity generation and checking 1  1, 1 /2 or 2 stop bits per character  Break, overrun and framing error detection  Data rates to 76.8K bps � Byte oriented synchronous capabilities:  Internal or external character synchronization  Automatic CRC generation/checking � SDLC/HDLC capabilities:  Abort sequence generation and checking  Automatic zero insertion and detection  Automatic flag insertion between messages  Address field recognition and DMA request levels and seven other enhancements  I field residue handling to improve SDLC link layer performance.  CRC generation/handling  SDLC loop mode with EOP recognition/loop The ESCC can operate in Polling, Interrupt and Block entry and exit Transfer modes to transfer data, status and control � Z85230 Enhanced SCC for improved performance information to the CPU. The Block Transfer mode can � 4 byte transmit and 8 byte receive FIFO be under CPU control or DMA channel 1 or 3. � Interrupt or DMA control � Configurable as DTE or ACE Asynchronous Modes - Transmission and reception � Software programmable baud rate generator is accomplished independently on each channel with � +5 volt only operation five to eight bits per character plus optional even or 1 � 8- or 16-bit PC/104 stackthrough connector odd parity. It will handle 1, 1 /2 or 2 stop bits; false � Small size: 3.6” x 3.8” (90mm x 96mm) start bit detection and automatic receiver break de- o o � Operating temperature: -40 C to +85 C tection and handling. Error detection is provided for parity, overrun and framing. The PCM-ESCC is a PC/104 dual channel, multiprotocol data communications controller based upon the Synchronous Modes - The PCM-ESCC supports both Z85230 Enhanced SCC. Each serial channel is indepen- byte-oriented and bit-oriented synchronous commu- dent and capable of synchronous or asynchronous data nications. Synchronous byte-oriented protocols can communications with either RS-232 or optional RS- be handled in several modes, allowing character syn- 422/485 electrical levels. The module can be config- chronization with a 6-bit or 8-bit synchronous charac- ured to satisfy a wide variety of serial communications ter (Monosync) or any 12-bit synchronization pattern applications and can be used to interface to a terminal, (Bisync). printer, modem, or other serial system peripherals. The ESCC supports synchronous bit-oriented protocols, FUNCTIONAL CAPABILITY such as SDLC and HDLC, by performing automatic flag sending, zero insertion, CRC generation and other spe- Serial Controller - The onboard Z85230 SCC controller cial hardware enhancements. provides dual channel serial communications for any common asynchronous or synchronous data communi- The ESCC may be programmed to encode and decode cation protocol. In addition to the standard features of the serial data in four different ways: NRZ, NRZI, FM0 the SCC, it has many enhancements to improve its per- and FM1. A Digital Phase-Locked-Loop is on each chan- formance. These include a 4 byte transmit FIFO and 8 nel to recover clock information from a data stream byte receive FIFO, programmable FIFO interrupt with NRZI or FM encoding. The RS-422/485 RxD and TxD lines are wired to a sepa- rate 10-pin connector. Sync clocks are available for Channel A, if Channel B is not used as RS-422/485. PC/104 Interface - The PCM-ESCC is I/O mapped. It requires 4 contiguous port addresses which are jumper selectable on any even 4 port boundary. The PCM- ESCC-8 card is an 8-bit stackthrough card supporting 8- bit data transfers only. The PCM-ESCC-16 also supports 8-bit data transfers but is populated with the 40-pin con- nector to support additional interrupt request lines. Interrupts - The interrupt request is buffered and selec- table on the PC/104 bus as IRQ 2 - 7. The PCM-ESCC-16 additionally supports IRQ 10, 11, 12, 14 and 15. The board supports the interrupt-sharing option on the PC/104 bus. SPECIFICATIONS Electrical PCM-ESCC-8: 8-bit, PC/104 stackthrough PCM-ESCC-16: 8-bit or 16-bit, plus extra interrupts Serial: Two RS-232 serial channels. Optional PCM-ESCC BLOCK DIAGRAM RS-422/485 with the CK-75176-2 installed. Vcc = +5V ±5% @ 140mA Serial Configuration - Each channel supports Transmit Data (TxD), Receive Data (RxD), Request to Send Mechanical (RTS), Clear to Send (CTS), Data Set Ready (DSR), Dimensions: 3.6” x 3.8” (90mm x 96mm) Receive Clock (DB), Data Carrier Detect (DCD), Data Terminal Ready (DTR) and Transmit Clock. Both the Connectors serial data and modem control lines are jumper selec- RS-232 Serial: Two, 26-pin 0.100” grid table for either DTE or DCE operation. Transmit and RS-422/485 Serial: Two, 10-pin 0.100” grid receive synchronous clock lines are also supported. PC/104: 64-pin, 0.100”, 32-pin double row PC/104: 40-pin, 0.100”, 20-pin double row The signals from each channel are brought out to sepa- (PCM-ESCC-16 only) rate 26-pin male right angle headers on the card edge Jumpers: 0.025” square posts which allows easy connections to a flat cable 25-pin “D” type adapter cable. WinSystems offers both the Environmental CBL-101-3 male, and CBL-102-3 female type “D” ribbon o o Operating Temperature: -40 C to +85 C cables. ORDERING INFORMATION Electrical Interface Levels - The board is shipped in a standard configuration that supports RS-232. Option- PCM-ESCC-8 Dual serial async/sync module ally, RS-422/485 electrical levels can be supported on PCM-ESCC-16 Dual serial async/sync module both channels for the transmit and receive lines by a CBL-101-3 3’ male 25-pin “D” adapter cable user installable chip kit. WinSystems’ CK-75176-2 chip CBL-102-3 3’ female 25-pin “D” adapter cable kit can be ordered for each channel that contains two CK-75176-2 RS-422/485 chip kit for 1 channel 75176B devices. 715 Stadium Drive  Arlington, Texas 76011  (817) 274-7553  http://www.winsystems.com