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PDF DS87000 Data sheet ( Hoja de datos )
| Número de pieza | DS87000 | |
| Descripción | Microcontroller Programmer | |
| Fabricantes | Dallas Semiconducotr | |
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DS87000
Microcontroller Programmer
Features
• Operates in Stand Alone or PC-Hosted Modes
• Easy to use pull-down menus in PC-Hosted
mode
• Operation from front panel in stand alone
mode
• Uses efficient "intelligent" programming
techniques
• Non-volatile data and operating parameter
storage
• Optional automatic device serialization
(unique identifier written to every device
programmed)
• Programs 40-pin DIP packages; DS87001
plug-in adapters available for other package
types
• Includes 110 volt (DS87000-000 for U.S.) or
220 volt (DS87000-220) power supply
Description
The DS87000 is a programming solution that provides a convenient, inexpensive method of programming
Dallas Semiconductor's family of EPROM-based Microcontrollers. The system comes complete with the
programmer, menu based PC software, power supply, and RS-232 cable. The programmer may be operated
in a stand-alone or PC hosted mode. Initially, a PC loads programming information into the DS87000. Once
loaded, there is no further requirement for the PC and the programmer may then be operated completely from
its front panel if desired. This allows the DS87000 to be easily moved to where it is needed. When a PC is
available, the DS87000 may be operated from the menu-based software provided.
Operations in front panel in stand-alone mode are initiated via the programmer's four push buttons. Three
lights (LEDs) provide feedback on system status. The convenient plug-in transformer provided with the
programmer supplies all necessary power.
When operated in PC-hosted mode, the user is offered full flexibility of the programmer through a system of
pull-down menus. All commands, options and menus are arranged to provide convenient access to each
command. The main menu screen is divided into DOS, Buffer, Encryption, Device, and Script Definition
menus. Each of these menus contains sub- for controlling various parts of the system.
The DS87000 also offers a unique feature typically found only in more expensive programming equipment.
This feature allows the DS87000 to write a unique identification number to every device programmed. After
initial conditions are established, the programmer automatically writes and subsequently increments a serial
number unique to each device.
The following sections describe operational details and installation procedures of the DS87000. The overall
programming environment is comprised of the programmer, the device to be programmed (or simply the
device), the system software, and the optional standard personal computer (PC).
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DS87000
ending address of the range to be checked. The default range is displayed, and may be modified or accepted
as is.
Program
Program the device's EPROM memory with the contents of the programmer's buffer. The user is prompted to
enter the beginning and ending address of the range to be programmed. The default range is displayed, and
may be modified or accepted as is.
Unlike the program button, the program command only writes data from the buffer to the device. It does not
perform multiple functions as the button does (see hardware section). If operations other than programming
are desired, the Program Via Script command must be used.
Serialize
This command allows the user to store a unique serial number into each device programmed. The user is
prompted to enter hex values for the parameters Length, Address, and Value. The Length parameter
determines how many bytes the serial number will occupy (up to a maximum of 4 bytes = 32 bits). The
Address parameter determines the device's EPROM address where the least significant (or only) byte of the
serial number will be stored. Subsequent bytes will be stored at higher addresses. The Value parameter sets
the initial serial number (that is, the next number to be programmed). The user must ensure that the area of
EPROM that the serial number will be written to is blank and unused by the data. As this menu is exited, the
user is allowed to write the serial number to the device immediately or simply store the changes to the
parameters.
After programming the serial number into a device, it is treated as a simple binary number and incremented
by one. In the event that it increments beyond what can be represented in the user defined Length parameter,
the serial number wraps around to 0. Therefore, this parameter must be chosen to accommodate the
maximum number of devices that will be serialized.
All of the command parameters above are stored in non-volatile memory in the programmer, so they will
continue to be in effect even after power is removed. Since serializing writes a unique number to the device’s
EPROM, this function must be performed after the device is verified (unless a verify over an appropriate
range is performed). Otherwise an error will be detected.
Option Byte
This command allows the user to write the contents of the device's option byte. For specific option byte bit
definitions, refer to the device's data sheet. Unused bits should be set to 1’s.
Write Encryption
Write the encryption vector contained in the programmer's memory into the device. Note that after this
operation, read and verify device operations will produce encrypted output if the encryption vector is non-
blank. If the encryption vector is blank (all 1’s), the encryption has no effect.
Write Lock Bits
This command allows the user to write the desired lock bits into the device. The bit settings and therefore the
degree of lock security is dependent on user input. Since level 1 lock is the device’s default condition, this
level is not an option on the menu. Each higher level of lock includes the security of all lower levels as
indicated below.
• Level 1:
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5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet DS87000.PDF ] | |
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