Siemens SPC3 manual Hardware Interface, Universal Processor Bus Interface, General Description

Page 39

 

 

SPC3

PROFIBUS Interface Center

 

 

 

 

 

 

7Hardware Interface

7.1 Universal Processor Bus Interface

7.1.1 General Description

SPC3 has a parallel 8-bit interface with an 11-bit address bus. SPC3 supports all 8-bit processors and microcontrollers based on the 80C51/52 (80C32) from Intel, the Motorola HC11 family, as well as 8-/16-bit processors or microcontrollers from the Siemens 80C166 family, X86 from Intel, and the HC16 and HC916 family from Motorola. Because the data formats from Intel and Motorola are not compatible, SPC3 automatically carries out ‘byte swapping’ for acceses to the following 16-bit registers (interrupt register, status register, and mode register0) and the 16-bit RAM cell (R-User_Wd_Value). This makes it possible for a Motorola processor to read the 16-bit value correctly. Reading or writing takes place, as usual, through two accesses (8-bit data bus).

Due to the 11-bit address bus, SPC3 is no longer fully compatible to SPC2 (10-bit address bus). However, AB(10) is located on the XINTCI output of the SPC2 that was not used until now. For SPC3, the AB(10) input is provided with an internal pull-down resistor. If SPC3 is to be connected into existing SPC2 hardware, the user can use only 1 kByte of the internal RAM. Otherwise, the AB(10) cable on the modules must be moved to the same place.

The Bus Interface Unit (BIU) and the Dual Port RAM Controller (DPC) that controls accesses to the internal RAM belong to the processor interface of the SPC3.

In addition, a clock rate divider is integrated that the clock pulse of an external clock pulse generator divided by 2 (Pin: DIVIDER = High-Potential) or 4 (Pin: DIVIDER = Low-Potential) makes available on the pin CLKOUT2/4 as the system clock pulse so that a slower controller can be connected without additional expenditures in a low-cost application. SPC3 is supplied with a clock pulse rate of 48MHz.

7.1.2 Bus Interface Unit (BIU)

The BIU forms the interface to the connected processor/microcontroller. This is a synchronous or asynchronous 8-bit interface with an 11-bit address bus. The interface is configurable via 2 pins (XINT/MOT, MODE). The connected processor family (bus control signals such as XWR, XRD, or R_W, and the data format) is specified with the XINT/MOT pin. Synchronous (rigid) or asynchronous bus timing is specified with the MODE pin.

Various Intel system configurations are displayed in the figures in Section 7.1.3. The internal address latch and the integrated decoder must be used in the C32 mode. One figure displays the minimum configuration of a system with SPC3, whereby the block is connected to an EPROM version of the controller. Only a pulse generator is necessary as an additional block in this configuration. If a controller is to be used without an integrated program memory, the addresses must once again be latched off for the external memory. The connection schematic in the next figure is applicable for all Intel/Siemens processors that offer asynchronous bus timing and evaluate the ready signal.

Notes:

If the SPC3 is connected to an 80286 processor, or others, it must be taken into consideration that the processor carries out word accesses. That is, either a “swapper” is necessary that switches the characters out of the SPC3 at the relevant byte position of the 16-bit data bus during reading, or the least significant address bit is not connected, and the 80286 must read word accesses and evaluate only the lower byte, as displayed in the figure.

SPC3 Hardware Description

V1.3

Page 37

Copyright (C) Siemens AG 2003 All rights reserved.

 

2003/04

Page 38 Page 40
Image 39
Page 38 Page 40
Contents Simatic NET Page SIM Atic NET SPC3 Hardware Description Profibus Interface CenterRelease Date Changes VersionsDirectory Mode RegisterStatus Register Interrupt Controller Watchdog Timer DPBuffer Structure Description of the DP Services11.3 Diagnostics Processing from the System View Asic TestPin Assignment Example for the RS 485 Interface SPC3 Introduction Function Overview Cmos Pin DescriptionCPD Cmos with pull down TTLt Schmitt trigger V1.3 Memory Allocation Memory Area Distribution in the SPC35FFH Segment Processor Parameters Latches/Register Significance Write Access OCH 0DH0EH 0FH Organizational Parameters RAM 1DH 1AH1BH 1CHAsic Interface Mode RegisterDisstartcontrol EOI Mode Register 1 Mode-REG1, writableSTARTSPC3 Exiting the Offline stateStatus Register Status Register Bit15 . .readable FdlindstSPC3 IRR IMR Interrupt ControllerDxout IAR IMRResponse Time Monitoring Watchdog TimerAutomatic Baud Rate Identification Baud Rate MonitoringDPBuffer Structure PROFIBUS-DP InterfaceUart Aux-Buffer Management RAMDescription of the DP Services SetSlaveAddress SAP55Sequence for the SetSlaveAddress Utility SetParam SAP61 Parameter Data StructureParameter Data Processing Sequence SPC3 CheckConfig SAP62Diagnostics Processing Sequence SlaveDiagnosis SAP60SPC3 Structure of the Diagnostics Buffer WriteReadData / DataExchange DefaultSAPWriting Outputs Reading Inputs GlobalControl SAP58 UserWatchdogTimerGetConfig SAP59 ReadInputs SAP56ReadOutputs SAP57 Bus Interface Unit BIU Hardware InterfaceUniversal Processor Bus Interface General DescriptionBus Interface V1.3 XINT/MO ModeLow Cost System with 80C32 Switching Diagram PrinciplesSystem X86-Mode Application with the 80 C SPC3Application with th 80 C Interface Signals UartAsic Test DC-Specifikation of the I/O- Drivers Technical DataMaximum Limit Values Permitted Operating ValuesAC-Specification for the Output Drivers Tabel 8.3 DC-Specifikation of the I/O- DriversCurrent Tabelle 8.5 Leakage current of the output drivers Clock Pulse Timing Timing CharacteristicsSYS Bus Interface Clock pulse 48 MhzTBD ResetTiming in the Synchronous C32-Mode ST-Vers Min Max UnitSynchronous Intel-Mode, Processor-Write-Timing Synchronous Intel-Mode, Processor-Read-TimingTiming in the Asynchronous Intel Mode X86 Mode ST-VersParameter Min Max XWR XCS Asynchronous Intel-Mode, Processor-Read-TimingXRD XCS Xready Asynchronous Intel-Mode, Processor-Write-TimingSynchronous Motorola-Mode, Processor-Read-Timing 4.1 74.2Timing in the Asynchronous Motorola-Mode for example, 68HC16 Synchronous Motorola-Mode, Processor-Write-TimingAsynchronous Motorola-Mode, Processor-Read-Timing XCS XdsackAsynchronous Motorola-Mode, Processor-Write-Timing Pulse 48 MHz Serial Bus InterfaceHousing PQFP-44 Housing SPC3 Hardware Description 14.15 Symbol Min Typ Max AMI-Vers13.65 13.90TXD Profibus InterfacePin Assignment RTSSN65ALS1176 Example for the RS 485 InterfaceTechnical contact person at ComDeC in Germany AppendixAddresses Profibus User Organisation10.3.2 SPC3 ST General Definition of TermsOrdering of ASICs 10.3.1 SPC3 AMIStatdiag Appendix a Diagnostics Processing in Profibus DPDiagnostics Bits and Expanded Diagnostics IntroductionIdentifier Byte 7 has Etc Identifier Byte 0 has Combi Diagnostics Processing from the System ViewSingle Diagnostics Simatic S5 / COM ETData format in the Siemens PLC Simatic Appendix B Useful InformationPage Siemens Aktiengesellschaft

SPC3 specifications

Siemens SPC3 is a state-of-the-art solution designed to enhance industrial automation, providing businesses with a robust platform for managing complex processes efficiently. This device epitomizes Siemens' commitment to innovation, blending cutting-edge technology with user-friendly features to deliver optimized performance across various applications.

One of the standout features of the Siemens SPC3 is its advanced processing capabilities. Equipped with high-performance processors, it can handle various tasks simultaneously, ensuring seamless operation even in demanding environments. This performance is complemented by enhanced memory capacity, which allows for increased data handling and improved execution speed, crucial for real-time monitoring and control applications.

The Siemens SPC3 also integrates a modular design, enabling flexibility and scalability. This characteristic allows users to customize their systems according to specific operational needs, adding or removing components as required. This adaptability is particularly beneficial for businesses that aim to scale their operations without incurring the substantial costs associated with overhauling existing systems.

Furthermore, the SPC3 employs the latest communication technologies, ensuring interoperability with various devices and systems. It supports industry-standard protocols, facilitating efficient data exchange between components. This connectivity is vital for establishing smart factories and enhancing overall productivity by creating a unified ecosystem.

Another significant aspect of the Siemens SPC3 is its focus on security. As cyber threats in industrial settings become increasingly sophisticated, Siemens prioritizes safeguarding user data and system integrity. The SPC3 incorporates advanced security features, including encryption and access control measures, to protect against unauthorized access and ensure data confidentiality.

Siemens has also emphasized ease of use in the SPC3. The interface is designed to be intuitive, allowing operators to navigate and configure the system effortlessly. Coupled with comprehensive software tools, users are empowered to implement changes swiftly while minimizing downtime.

In terms of energy efficiency, the SPC3 incorporates technologies that allow for optimized energy consumption, aligning with sustainability goals prevalent in today’s industries. By reducing energy waste, businesses not only lower operational costs but also contribute to environmental conservation.

In summary, Siemens SPC3 represents a significant advancement in industrial automation technology. Its high-performance processing, modular adaptability, advanced communication capabilities, robust security measures, and user-friendly design make it an ideal choice for businesses striving for efficiency and innovation in their operations. The SPC3 is more than just a control device; it is a comprehensive solution that meets the evolving demands of modern industries.
Top Page Image Contents