 |
Os motores de busca de Datasheet de Componentes eletrônicos |
|
|
Os motores de busca de Datasheet de Componentes eletrônicos |
|
OP296 Folha de dados(PDF) 77 Page - Analog Devices |
|
||||||||||||||||||||||||||||||
OP296 Folha de dados(HTML) 77 Page - Analog Devices |
|
|
77 / 88 page  ADuC841/ADuC842/ADuC843 Rev. 0 | Page 77 of 88 Note that PSEN is normally an output (as described in the External Memory Interface section) and is sampled as an input only on the falling edge of RESET, i.e., at power-up or upon an external manual reset. Note also that if any external circuitry unintentionally pulls PSEN low during power-up or reset events, it could cause the chip to enter download mode and therefore fail to begin user code execution as it should. To pre- vent this, ensure that no external signals are capable of pulling the PSEN pin low, except for the external PSEN jumper itself. Embedded Serial Port Debugger From a hardware perspective, entry into serial port debug mode is identical to the serial download entry sequence described in the preceding section. In fact, both serial download and serial port debug modes can be thought of as essentially one mode of operation used in two different ways. Note that the serial port debugger is fully contained on the part (unlike ROM monitor type debuggers), and therefore no external memory is needed to enable in-system debug sessions. Single-Pin Emulation Mode Also built into the part is a dedicated controller for single-pin in-circuit emulation (ICE) using standard production ADuC841/ ADuC842/ADuC843 devices. In this mode, emulation access is gained by connection to a single pin, the EA pin. Normally, this pin is hardwired either high or low to select execution from internal or external program memory space, as described earlier. To enable single-pin emulation mode, however, users need to pull the EA pin high through a 1 kΩ resistor, as shown in Figure 85. The emulator then connects to the 2-pin header also shown in Figure 85. To be compatible with the standard connector that comes with the single-pin emulator available from Accutron Limited (www.accutron.com), use a 2-pin 0.1 inch pitch friction lock header from Molex (www.molex.com) such as their part number 22-27-2021. Be sure to observe the polarity of this header. As represented in Figure 85, when the friction lock tab is at the right, the ground pin should be the lower of the two pins (when viewed from the top). Typical System Configuration The typical configuration shown in Figure 85 summarizes some of the hardware considerations that were discussed in previous sections. DEVELOPMENT TOOLS There are two models of development tools available for the ADuC841/ADuC842/ADuC843: • QuickStartTM—Entry-level development system • QuickStart Plus—Comprehensive development system These systems are described briefly in the following sections. QUICKSTART DEVELOPMENT SYSTEM The QuickStart Development System is an entry-level, low cost development tool suite supporting the parts. The system consists of the following PC based (Windows® compatible) hardware and software development tools. Hardware Evaluation board and serial port programming cable. Software Serial download software. Miscellaneous CD-ROM documentation and prototype device. A brief description of some of the software tools and components in the QuickStart Development System follows. Download—In-Circuit Serial Downloader The serial downloader is a Windows application that allows the user to serially download an assembled program (Intel® hexadeci- mal format file) to the on-chip program flash memory via the serial COM1 port on a standard PC. Application Note uC004 details this serial download protocol and is available from www.analog.com/microconverter. ASPIRE—IDE The ASPIRE integrated development environment is a Windows application that allows the user to compile, edit, and debug code in the same environment. The ASPIRE software allows users to debug code execution on silicon using the MicroConverter UART serial port. The debugger provides access to all on-chip peripherals during a typical debug session as well as single step, animate, and break-point code execution control. Note that the ASPIRE IDE is also included as part of the QuickStart Plus System. As part of the QuickStart Plus System, the ASPIRE IDE also supports mixed level and C source debug. This is not available in the QuickStart System, but there is an example project that demonstrates this capability. QuickStart Plus Development System The QuickStart Plus Development System offers users enhanced nonintrusive debug and emulation tools. The system consists of the following PC based (Windows compatible) hardware and software development tools. Hardware Prototype Board. Accutron Nonintrusive Single-Pin Emulator. Software ASPIRE Integrated Development Environment. Features full C and assembly emulation using the Accutron single pin emulator. Miscellaneous CD-ROM documentation. |
Nº de peça semelhante - OP296 |
|
Descrição semelhante - OP296 |
|
|
Ligação URL |
| Privacy Policy |
| ALLDATASHEETPT.COM |
| ALLDATASHEET é útil para você? [ DONATE ] |
Sobre Alldatasheet | Publicidade | Contato conosco | Privacy Policy | roca de Link | Lista de Fabricantes All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Portuguese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
