SERC816 STMicroelectronics

SERCON816 SERCOS INTERFACE CONTROLLER Single-chip controller for SERCOS interface Real time communication for industrial control systems 8/16-bit bus interface, Intel and Motorola control signals Dual port RAM with 2048 word *16-bit Data communications via optical fiber rings, RS PQFP100 485 rings and RS 485 busses Maximum transmission rate of 16 Mbaud with ORDERING NUMBERS: SERC816 internal clock recovery SERC816/TR Internal repeater for ring connections Full duplex operation Timing control signals Modulation of power of optical transmitter diode Automatic service channel transmission Automatic transmission of synchronous and Watchdog to monitor software and external data telegrams in the communication cycle synchronization signals Flexible RAM configuration, communication Compatible mode to SERCON410B SERCOS data stored in RAM (single or double buffer) or interface controller transfer via DMA 100-pin plastic flat-pack casing Synchronization by external signal Figure 1. SERCON816 Block Diagram WRN D 15:0 A 15:0 BUSYN MCSN0/1 ALEL PCSN0 RDN ALEH BHEN PCS1 ADMUX inter- BUSMODE 1:0 INT0/1 bus interface BUSWIDTH rupt BYTEDIR SCLK clock SCLKO2/4 MCLK reset RSTN DMAREQR/T DMA DMAACKNR/T watch- WDOGN dog CYC CLK telegram- timing- CON CLK processing DIV CLK control SBAUD L ERRN SBAUD16 RECACTN serial interface TM0/1 IDLE RxC TxC RxD TxD 6:1 optical transmitter/ receiver or RS-485 bus drive January 2003 1/23SERCON816 TABLE OF CONTENTS 1 GENERAL DESCRIPTION.................................................................................................................3 2 Pin Description ...................................................................................................................................5 3 Electrical (DC and AC) Characteristics ..............................................................................................7 3.1 Absolute Maximum Ratings .....................................................................................................7 3.2 Recommended Operating Conditions......................................................................................8 3.3 ELECTRICAL CHARACTERISTCS ........................................................................................8 3.4 Power Dissipation ....................................................................................................................9 3.4.1 Power Dissipation Considerations....................................................................................9 3.5 AC Electrical Characteristics..................................................................................................10 3.5.1 Clock Input MCLK...........................................................................................................10 3.5.2 Clock Input SCLK ...........................................................................................................11 3.5.3 Address Latch.................................................................................................................11 3.5.4 Read Access of Control Registers..................................................................................12 3.5.5 Read Access of Dual Port RAM .....................................................................................13 3.5.6 Write Access to Control Registers..................................................................................14 3.5.7 Write Access to DUAL Port RAM ...................................................................................15 4 Control Registers and RAM Data Structures....................................................................................16 4.1 Control Register Addresses ...................................................................................................16 4.2 Data Structures within the RAM.............................................................................................16 4.2.1 Telegram Headers..........................................................................................................16 4.2.2 Data Containers..............................................................................................................17 4.2.3 End Marker.....................................................................................................................18 4.2.4 Service Containers .........................................................................................................18 5 Additional Specifications, Tools and Support ...................................................................................21 5.1 Additional Specifications ........................................................................................................21 5.2 Hardware and Software Components....................................................................................21 5.3 Tools ......................................................................................................................................21 6 Package Mechanical Data: SERCON816 100 Pin Plastic Quad Flat Pack Package (PQFP100) ...............................................22 2/23