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F243 DSK 1999 DSP Development Systems Reference Technical F243 DSK Technical Reference 503486-0001 Rev. A June 1999 SPECTRUM DIGITAL, INC. 10853 Rockley Road Houston, TX. 77099 Tel: 281/561-6952 Fax: 281/561-6037 sales IMPORTANT NOTICE Spectrum Digital, Inc. reserves the right to make changes to its products or to discontinue any product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. Spectrum Digital, Inc. warrants performance of its products and related software to current specifications in accordance with Spectrum Digitals standard warranty. Testing and other quality control techniques are utilized to the extent deemed necessary to support this warranty. Please be aware that the products described herein are not intended for use in life-support appliances, devices, or systems. Spectrum Digital does not warrant nor is liable for the product described herein to be used in other than a development environment. Spectrum Digital, Inc. assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Nor does Spectrum Digital warrant or represent any license, either express or implied, is granted under any patent right, copyright, or other intellectual property right of Spectrum Digital, Inc. covering or relating to any combination, machine, or process in which such Digital Signal Processing development products or services might be or are used. WARNING This equipment is intended for use in a laboratory test environment only. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules, which are designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. TRADEMARKS Copyright 1999 Spectrum Digital, Inc. Contents 1 Introduction to the F243 DSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Provides you with a description of the F243 DSK, key features, and board outline. 1.0 Overview of the F243 DSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.1 Key Features of the F243 DSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Functional Overview of the F243 DSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2 Operation of the F243 DSK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Describes the operation of the F243 DSK. Information is provided on the DSKs various interfaces. 2.0 The F243 DSK Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.1 The F243 DSK Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.1.1 Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.2 F243 DSK Memory Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.2.1 Program Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.2.1.1 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 2.2.2 Data Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 2.2.3 I/O Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 2.3 Onboard UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7 2.4 F243 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 2.4.1 P1, Analog Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9 2.4.2 P2, I/O Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10 2.4.3 P3, Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11 2.4.4 P4, RS-232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 2.4.5 P5, JTAG Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 2.4.6 P6, Expansion Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14 2.4.7 Connector Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.5 F243 DSK Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 2.5.1 JP1, MP/MC Mode Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17 2.5.2 JP2, Vpp/Watchdog Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2.5.3 JP3, VREFLO Source Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18 2.5.4 JP4, VREFHI Source Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 2.5.5 JP5, UART Signal Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 2.6 LEDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19 2.7 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 2.8 DSK Resource Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20 A F243 DSK Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 Contains the schematics for the F243 DSK B F243 DSK Mechanical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 Contains the mechanical information about the F243 DSK About This Manual This document describes the board level operations of the F243 DSK which is based on the Texas Instruments TMS320F243 Digital Signal Processor. The F243 DSK is a stand alone module that allows engineers and software developers to evaluate certain characteristics of the TMS320F243 DSP to determine if the processor meets the designers application requirements. Evaluators can create software to execute onboard or expand the system in a variety of ways. Notational Conventions This document uses the following conventions. The “TMS320F243 DSP Starter Kit” or “F243 DSP Starter Kit” or “F243 DSK” will sometimes be referred to as the DSK. Program listings, program examples, and interactive displays are shown is a special italic typeface. Here is a sample program listing. equations !rd = !strobe Information About Cautions This book may contain cautions. This is an example of a caution statement. A caution statement describes a situation that could potentially damage your software, or hardware, or other equipment. The information in a caution is provided for your protection. Please read each caution carefully. Related Documents Texas Instruments TMS320F240 Users Guide Texas Instruments TMS320C2XX Fixed Point Assembly Language Users Guide Texas Instruments TMS320C2XX Fixed Point C Language Users Guide Texas Instruments TMS320C2XX Fixed Point C Source Debugger Users Guide 1-1 Chapter 1 Introduction to the F243 DSK This chapter provides you with a description of the Digital Signal Processor Starter Kit (DSK) for the TMS320F243 (F243 DSK) along with the key features and a block diagram of the circuit board. Topic Page 1.0Overview of the F243 DSK 1-2 1.1Key Features of the F243 DSK1-2 1.2Functional Overview of the F243 DSK1-3 Spectrum Digital, Inc 1-2 F243 DSK Technical Reference 1.0 Overview of the F243 DSK The F243 DSK is a stand-alone card that lets evaluators examine certain characteristics of the TMS320F243 digital signal processor(DSP) to determine if this DSP meets their application requirements. Furthermore, the module is an excellent platform to develop and run software for the TMS320F243 processor. The F243 DSK is shipped with a TMS320F243. The F243 DSK allows full speed verification of F243 code. With 32K words of on board program/data RAM the DSK can solve a variety of problems as shipped. Three expansion connectors are provided for any necessary evaluation circuitry not provided on the as shipped configuration. To simplify code development and shorten debugging time a symbolic assembler and Windowed debugger are provided. In addition an on board JTAG connector provides interface to emulators which operate with other debuggers that provide assembly language and C high level language debug. 1.1 Key Features of the F243 DSK The F243 DSK has the following features: TMS320F243 Digital Signal Processor RS-232 Communications interface to host PC for debug and communications 32K words on board program/data RAM 8K words on chip Flash memory On board 5 Mhz crystal 3 Expansion Connectors (analog, I/O, expansion) On board IEEE 1149.1 JTAG Connection for Optional Emulation 5 volt only operation with supplied AC adapter 9 pin serial cable included GO DSP Code Explorer Debugger included Symbolic assembler included Compatible with GO DSP Code Composer Compatible with TI C Compiler/assembler/linker Spectrum Digital, Inc 1-3 1.2 Functional Overview of the F243 DSK Figure 1-1 shows a block diagram of the basic configuration for the F243 DSK. The major interfaces of the DSK include the external program and data ram, JTAG interface, UART, and expansion interface. The DSK interfaces to 32K Words of on board static memory. This memory is divided between the program and data space An external I/O interface supports 65,000 parallel I/O ports. JTAG DATA ADDRESS RS-232 TMS320F243 JTAG P5 SRAM 32K x 16 A N A L O G E X P A N S I O N P 1 I / O E X P A N S I O N P 2 Figure 1-1 BLOCK DIAGRAM F243 DSK Program/ E X P A N S I O N P 6 ANALOG TO DIGITAL CONVERTER S E R I A L P 4 DRIVER Data Spectrum Digital, Inc 1-4 F243 DSK Technical Reference 2-1 Chapter 2 Operation of the F243 DSK This chapter describes the operation of the F243 DSK along with the key interfaces and an outline of the circuit board. Topic Page 2.0The F243 DSK Operation2-2 2.1The F243 DSK Board2-2 2.1.1Power Connector2-3 2.2F243 DSK Memory Interface2-3 2.2.1Program Memory2-4 2.2.1.1 Interrupts2-5 2.2.2Data Memory2-6 2.2.3I/O Space2-7 2.3Onchip UART2-7 2.4F243 DSK Connectors2-8 2.4.1P1, Analog Interface2-9 2.4.2P2, I/O Interface2-10 2.4.3P3, Power Connector2-11 2.4.4P4, RS-232 Interface2-12 2.4.5P5, JTAG Interface2-13 2.4.6P6, Expansion Connector2-14 2.4.7Connector Part numbers2-16 2.5F243 DSK Jumpers2-16 2.5.1JP1, MP/MC Mode Select2-17 2.5.2JP2, Vpp/Watchdog Select2-18 2.5.3JP3, VREFLO Source Select2-18 2.5.4JP4, VREFHI Source Select2-19 2.5.5JP5, UART Signal Source2-19 2.6LEDs2-19 2.7Resets2-20 2.8DSK Resource Limitations2-20 Spectrum Digital, Inc 2-2 F243 DSK Technical Reference 2.0 The F243 DSK Operation This chapter describes the F243 DSK, its key components, and how they operate. It also provides information on the DSKs various interfaces. The F243 DSK consists of six major blocks of logic. External program and data memory Analog Interface I/O Interface RS-232 interface Expansion interface JTAG Interface 2.1 The F243 DSK Board The F243 DSK is a 4.0 x 2.5 inch multi-layered printed circuit board which is powered by an external 5 Volt only power supply. Figure 2-1 shows the layout of the F243 DSK Figure 2-1, F243 DSK Spectrum Digital, Inc 2-3 2.1.1 Power Connector The F243 DSK is powered by a 5 Volt only power supply which is included with the unit. The power supply has a current rating of 1 amp. The unit requires 150 milliamps. The power is supplied via connector P3. If expansion boards are connected to the DSK a higher amperage power supply may be necessary. Section 2.4.2 provides more information on connector P3. 2.2 F243 DSK Memory Interface The DSK includes the following memory: 8K words on Chip Flash memory, 32K words on board ram memory split between program and data space. In the as shipped configuration the on chip Flash memory contains the debug target agent that interfaces to the host personal computer. The processor on the DSK is configured for the microcomputer mode. The DSK is designed such that the user can develop software and load it into on board RAM for debug. Spectrum Digital, Inc 2-4 F243 DSK Technical Reference 2.2.1 Program Memory The DSK uses program memory in two different areas; the on chip flash, and the on board RAM. The on chip Flash memory contains the interrupt vectors and target debug agent. This target debug agent is a small program monitor that interfaces to the debugger program on the PC through the RS-232 interface. The target agent resides low in the on chip Flash and is executed upon reset or power up. The on board RAM resides off chip and is used by application programs. The 16K words of off chip RAM in program space (0 x8000-0 xBFFF) has images duplicated at addresses starting at 0 x4000 and 0 xC000. The figure below shows the program memory configuration on the F243 DSK. Hex 0000 003F 0040 1FFF 4000 7FFF 8000 BFFF C000 FDFF FF00 FFFF Interrupts (On chip Flash EEROM) On-chip Flash ROM (Flash EEPROM) (8 Segments) External RAM On-Chip DARAM B0 (CNF = 1) External (CNF = 0) External (CNF = 0) B0 (CNF = 1) On-Chip DARAM Image of 0 x8000-0 xBFFF FE00 FEFF Figure 2-2, F243 DSK Program Space Image of 0 x8000-0 xBFFF 2000 3FFF Image of 0 xA000-0 xBFFF Spectrum Digital, Inc 2-5 2.2.1.1 Interrupts Because the interrupt vectors are in Flash EPROM the user does not have access to them. In addition the target debug agent uses the power up vector and the on chip UART interrupt vector. All other vectors are redirected to a base address of 0 x8000 in program space plus the vector offset. The debug agent does this remapping by placing a “branch” instruction to 0 x8000 + the offset for each interrupt. The agent also places a “return” instruction at each user vector location on power up to help prevent false/unwanted interrupts from hampering debug sessions. Furthermore, the debug agent must leave interrupts enabled all the time to allow for the serial communications interface to communicate with the host PC. As a result the user should use a trap for enabling and disabling interrupts since only breakpoints can be used to debug “around” this code. This allows the users program to make use of the interrupts on the F243 DSK. CAUTION The user should not disable interrupts for extended periods of time. When interrupts are disabled the user cannot cause a break from the debugger on the PC. Spectrum Digital, Inc 2-6 F243 DSK Technical Reference 2.2.2 Data Memory The data memory configuration on the F243 DSK is shown in the figure below. The on chip data memory is partially used by the debug target agent for its dynamic variables. The remainder of the on chip data memory and the off chip data RAM can be used by user applications. The location of the on chip memory mapped peripheral registers are also shown because these reside in the data space. An image of data space memory 0 x8000-0 xBFFF is duplicated starting at data space address 0 xC000. Off board memory 0 xC000-0 xFFFF is accessible with a GREG value of 0 x00C0,. Hex 0000 005F 0060 007F 0080 00FF 0100 01FF 0200 02FF 0300 03FF 0400 04FF 0500 07FF 0800 6FFF 7000 73FF 7400 743F 7440 77FF 78