Unitek 6-099-04, Operation And Maintenance Manual

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CHAPTER 1: SYSTEM DESCRIPTION
MICROPULL
®
IV WIRE BOND PULL TESTER
1-8 990-180
The MP4 Data Logging Software is intended to provide a general purpose, “plain vanilla” method of
data collection. Source code is provided which should allow the user to make any necessary
modifications. The program is supplied in three formats, on a 5-1/4 inch, unprotected, PC/MS-DOS
compatible diskette. MP4.BAS is a n interpreted BASIC program which has been tested, using IBM
PC-DOS Version 3.21, with BASICA Version 3.2, and Microsoft MS-DOS Version 3.21, with
GWBASIC Version for MP4.EXE which was compiles using Microsoft Corportiaion’s QuickBASIC
®
Version 4.0. Templates named NONDEST.WK1 and DESTRUCT.WK1, are used to import the “.PRN”
files generated by the MP4 software into Lotus 1-2-3.
The system hardware requirements are: an IBM PC, or most compatibles, with a minimum of 256K
RAM and two disk drives, one of which is a hard drive. The system must have an Asynchronous
Communications Adapter, equipped with a male DB-25 connector., capable of operating at 1200 baud.
Our experience indicates that the cursor keypad on the “5151” type keyboard works as expected. The
cursor pad on the enhanced IBM AT style keyboard does not function properly. This software requires
a printer whose instruction set is IBM compatible.
RS-232C Serial Interface
This interface is a single-board computer that converts the information, presented as parallel data on the
Data Output connector, to 1200 baud, ASCII coded, serial data, available on an RS-232C connector on
the rear of the MP4. The RS232C interface inserts the decimal point into the correct position in the
data. This interface is capable of driving a serial-buffered printer or communicating with an external
computer. Data resulting from each test is transmitted while the MP4 performs the next test. The actual
transmission consists of ten bit characters sent serially. Each character has one start bit, eight ASCII
coded data bits, and one stop bit. The communication is bi-directional and asynchronous, but flows in
one direction at a time. This is commonly referred to as Half Duplex Communication. The codes, listed
in table 1-5, are generated by the MP4, converted to the corresponding message by the single-board
computer, and connected to the RS-232C Connector.
Table 1-5. Serial Interface Codes
Code Message
0 No test
1 Valid test
2 Wire broke
3 Wire broke/Hold time
5 Over range
8 Hit Upstop
9 Hit Upstop/Hold time
– False error X (Where X = 4,6,7,10,11,12,13,14,15)
Random False Errors are caused by touching the hook during a test or by the hook hitting the substrate.
The False Error Message number is helpful when troubleshooting the RS-232C board.
The pin connections on the RS-232 printer/computer connector are such that the MP4 receives data on
pin 2 and transmits data on pin 3. This means that an external Null Modem is not required to transmit
data to either a printer or computer.