DS87000 datasheet, PDF - EEWORLD Datasheet

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DS87000: DescriptionMicrocontroller Programmer; File Size44KB，10 Pages; ManufacturerDALLAS; Websitehttp://www.dalsemi.com

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DS87000 Overview

Microcontroller Programmer

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DS87000

Microcontroller Programmer

www.dalsemi.com

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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030700

DS87000

Drive

This command allows the user to select another disk drive for the files used in the buffer menu’s load and

save commands.

Compare

This command compares the contents of the buffer with the contents of the selected file. Every byte

contained in the file is compared to the corresponding byte (same device address) in the buffer.

Fill

Fill the programmer's buffer with a specific value or a random number. When unsure of the buffer memory

contents, this command can be used to initialize the buffer to a known value. Also, by using the random

option to fill the buffer with random numbers before loading a program, the encryption function will provide

more security. The user is prompted to enter the beginning and ending address of the range to be filled. The

default range is displayed, and may be modified or accepted as is. The user is also prompted to enter a value

(in hex) to use for filling. Entering an “R” will cause a series of random numbers to be used.

Edit

This command provides full screen edit capability of the programmer's data buffer memory. The cursor keys

allow character by character movement within the buffer. In addition, page up, page down, home, end, and

their control key combinations allow movement in larger increments.

The information contained in the buffer memory is presented in hex format in the center of the screen, and

the ASCII representation on the right. If the hex value cannot be represented in printable ASCII, a period (.)

is displayed. The cursor may be placed over either the hex or ASCII value and a new value entered. When

exiting the edit function after modifying one or more bytes of the buffer, the user will be asked if the changes

should be saved.

Encryption Menu

Load

Load an encryption vector from a PC file to the programmer. The PC file is a standard ASCII file

representing hex values, and may be created using any ASCII text editor. The file must include exactly 64

hex values (separated by spaces), which will be read and stored sequentially. During a load, if the file does

not contain exactly 64 hex values, the programmer’s encryption vector will not be modified, and an error

message will be displayed. Note that this command simply loads an encryption vector into the programmer. It

is the Write Encryption Vector command of the Device menu that actually stores the vector into the device.

Save

Save the current encryption vector contained in the programmer to a PC file. This information is stored as

standard ASCII representing 64 hex values.

Drive

This command allows the user to select another disk drive for the files used in the encryption menu’s load

and save commands.

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DS87000

Edit

This command provides full screen edit capability of the programmer’s encryption vector. All bytes of the

vector are displayed on the screen, and each can be individually edited. The vector is presented in hex format

in the center of the screen, and the ASCII representation is to the right. If the hex value cannot be represented

in printable ASCII, a period (.) is displayed. The cursor may be placed over either the hex or ASCII value and

a new value entered. When exiting the edit function after modifying one or more bytes of the vector, the user

will be asked if the changes are to be saved. If yes, the new vector will be stored in the programmer.

The user may clear the entire encryption vector by entering an ALT-C. Note that a cleared encryption vector

is all ones, and if a cleared vector is stored in the device, there will be no encryption. A series of random

numbers will be used to fill the encryption vector if an ALT-R is entered. A randomly selected encryption

vector provides a more secure device.

DEVICE MENU

Blank Check

This command reads the device to confirm that it is completely erased (all 1’s). The user is prompted to enter

the beginning and ending address of the range to be checked. The default range is displayed, and may be

modified or accepted as is.

Read

This command will read all or part of the device's EPROM and store it in the programmer's buffer memory.

The user is prompted to enter the beginning and ending address of the range to be read. The default range is

displayed, and may be modified or accepted as is.

If an encryption vector has been stored in the device, the data will be encrypted as it is read. If the intent is to

read non-encrypted data, the read must be performed before the encryption array is written to the device. The

lock bits also have an effect on this function. If either of the two highest levels of lock are written to the

device, the data read will be all ones.

Verify

Verify that the device's EPROM contains the same information as the programmer's buffer. The user is

prompted to enter the beginning and ending address of the range to be verified. The default range is

displayed, and may be modified or accepted as is.

Since the verify function actually reads data from the device, verify must be performed before the device’s

encryption array, lock bits, and/or serial number are written. After the encryption array is written to the

device, all data that is read will be encrypted as a standard function of this security measure. After the lock

bits are written, it may not be possible to read the device at all, depending on the level of lock. The serial

number is unique for every device programmed, so it will not verify from one device to another.

IBlank Check

This command reads the device to confirm that it can be programmed with the contents of the buffer. This

mode makes use of the fact that a completely blank device is not required for proper programming. For

instance, if the device contains a 0 bit where a 0 bit is to be programmed, then it does not matter that the bit

is not "blank" (i.e., 1). Also, if a byte already contains the byte to be programmed, then it does not need to be

re-programmed, and it does not matter that it is not blank. The user is prompted to enter the beginning and

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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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