View MAX191EVKIT_398226.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-4506; Rev 4; 2/97
MAX191 Evaluation System/Evaluation Kit
General Description
The MAX191 evaluation system (EV system) consists of a MAX191 evaluation kit (EV kit) connected to a Maxim 80C32 microcontroller (C) module. The unit connects to an IBM-compatible personal computer running software provided with the MAX191 EV kit. Both boards come fully assembled and tested. The MAX191 EV system can configure the MAX191 in a variety of ways: It can operate in serial- or parallel-interface mode and in unipolar or bipolar mode, and VSS can be connected to ground or -5V. All functions are controlled through keyboard commands entered on the personal computer. The MAX191 EV system supersedes the MAX190 EV kit. The MAX190 kit was limited to the positive input range (0V to +4.096V) and serial-interface mode only. Order the EV system (MAX191EVSYS-DIP) to evaluate the MAX191 using software. Order the EV kit (MAX191EVKIT-DIP) if the 80C32 module (80C32MODULE-DIP) has already been purchased separately or with another Maxim EV system. The MAX191 EV kit alone can be used for limited evaluation of the MAX191 (see the EV Kit Quick Start section).
Features
o EV System Includes EV Kit and 80C32 C Module o 12-Bit Resolution, 1/2LSB Linearity ADC o MAX191 Operates in Single- or Dual-Supply Mode o EV System Operates in: Unipolar- or Bipolar-Input Mode Serial- or Parallel-Interface Mode o Fully Assembled and Tested o Software Source-Code Provided o Interfaces to IBM-Compatible Computer through RS-232 Communications Port o Kit Supports Conversion Rates Beyond 50ksps
Evaluates: MAX191
Ordering Information
PART MAX191EVSYS-DIP MAX191EVKIT-DIP 80C32MODULE-DIP TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C BOARD TYPE Through-Hole Through-Hole Through-Hole
___________________________________________________________________EV System
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
EV System Component List
QTY 1 1 DESCRIPTION MAX191 evaluation kit (MAX191EVKIT-DIP) Maxim 80C32 C module (80C32MODULE-DIP)
EV Kit Component List
DESIGNATION C1 C2, C3, C4, C5, C6, C13 C7 C8, C9, C11, C12, C14 C10 R1, R2 RS1 U1 U2 U3 U4 H1 J1 None None None QTY 1 6 1 5 1 2 1 1 1 1 1 1 1 1 1 1 DESCRIPTION 200pF ceramic capacitor 10F 16V electrolytic capacitors 22F ceramic capacitor 0.1F ceramic capacitors 0.01F ceramic capacitor 1k 5% resistors 10k 9-resistor SIP 74HCT157A Maxim DG413DJ Maxim ICL7660CPA Maxim MAX191BCNG 10-pin header Female data connector Software on 5 1/4" floppy disk 3.00" x 3.00" PC board MAX191 data sheet
4) Connect an 8V to 16V source to the 2-pin power connector on the 80C32 module. The positive lead connects to the terminal marked VIN. The Maxim 80C32 module requires approximately 100mA. The MAX191 evaluation board draws less than 10mA. 5) Connect a cable from the personal computer to the 9-pin connector on the 80C32 module. If the serial port on the personal computer has a standard 9-pin connector, a straight-through cable is used to attach the board. Computers with a 25-pin serial port connector need an adapter or adapter cable (D25 female to D9 male); both are available at most computer stores. 6) Turn on the power to the 80C32 module. The switch is located near the 2-pin power connector. The LED indicates power from the on-board regulator. 7) To start the Maxim EV system software on the personal computer, set the default drive or directory to match the storage location of the Maxim programs, then enter the program name "191EVKIT". 8) Set the active serial port, shown on the bottom line, to indicate the port connected to the Maxim 80C32 module. The Ctrl-T command toggles the active port between COM1 and COM2. A list of commands affecting the communications link appears at the bottom of the screen. 9) The 80C32 module will transmit a logon message and RAM test results when communications are initialized. The MAX191 RAM resident program will then be downloaded automatically. The system is ready for use when the MAX191 revision banner appears and the status indication on the bottom display line changes to "*** READY ***". 10) Enter a "?" to display a menu of available MAX191 conversion commands. This help list is available whenever the MAX191 system is ready for use. 11) Connect an analog input across the MAX191 inputs (AIN+ and AIN-). The input range is 0V to +4.096V for unipolar and -2.048V to +2.047V for bipolar operation. 12) Single conversions are displayed whenever the Enter key is pressed. Continuous conversions are initialized with a "C" and continue until any key is pressed.
EV System Quick Start
The MAX191 EV system includes a Maxim 80C32 C module and a MAX191 EV kit. The two connect through a 40-pin data connector on adjoining edges of the boards. The EV system then connects to an IBM-compatible computer running software provided with the MAX191 EV kit. The following steps outline the procedure for using the MAX191 EV system: 1) Copy the MAX191 software disk to another disk or to a hard-disk directory in the personal computer. Store the original disk in a safe location. 2) Read the README text file found on the floppy disk. It contains information on any hardware or software changes made after this manual was written. 3) Connect the MAX191 evaluation board to the 40-pin data connector on the Maxim 80C32 module.
2
_______________________________________________________________________________________
MAX191 Evaluation System/Evaluation Kit
EV Kit Quick Start
Without the 80C32 module, the MAX191 evaluation board can perform a limited evaluation of the MAX191 using external signals. To evaluate the device in the serial-interface mode, refer to the timing diagram in Figure 10b of the MAX191 data sheet and connect the board as follows: 1) Connect a +5V power supply to the marked pads (GND and +5V) on the board. 2) Ground the PAR pin on the 10-pin header to set the MAX191 in the serial-interface mode. 3) Connect the clock signal (0.1MHz to 1.6MHz) to the SCK pin on the 10-pin header. 4) Connect the chip-select signal (CS) to the serial chip-select pin (SCS) on the 10-pin header. 5) Connect an oscilloscope to the serial data pin (SDAT) on the 10-pin header. 6) The MAX191 VSS voltage can be changed to -5V by grounding the VSS select pin (VSEL) on the 10-pin header. The VSS voltage is 0V when this pin is left open. 7) Leaving the BIP pin of the 10-pin header open will operate the MAX191 in bipolar mode. Grounding the pin will change the mode to unipolar.
Evaluates: MAX191
Table 1. Port 1 Bit Functions
BIT P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 NAME SCK VSEL BSY PAR BIP HBE SRD SCS FUNCTION Clock signal for serial mode Selects 0V or -5V for MAX191's VSS pin: Low = 0V, High = -5 The MAX191 BUSY output The MAX191 PARallel mode select pin. Also controls the 74HCT157 multiplexer. The MAX191 BIPolar pin The MAX191 HBEN (high-byte enable) pin The MAX191 D7/SDATA (serial data) pin Serial mode chip-select signal
Interface Modes
Communications between the 80C32 module and the MAX191 can be in serial or parallel mode. A 74HC157 multiplexer is used to toggle the MAX191 chip-select signal (CS) between the serial chip select (SCS, P1.7) and a decoded address signal (CS0). In either mode, the MAX191 BIP, PAR, and HBEN pins are controlled by the 80C32 port 1 programmable bits. In serial mode, port 1 also toggles the clock pin and receives the serial data. Table 1 lists the functions of the port 1 bits.
_______________Detailed Description
VSS Circuit
An ICL7660 +5V to -5V converter and a DG413 analog switch are the means for switching the MAX191's VSS voltage between ground and -5V. The analog switch is not required for most application circuits because the VSS voltage will be fixed at either -5V or ground. The MAX191 requires a negative supply only if the input voltage is expected to go below ground. The ICL7660 provides a -5V source with minimal additional circuitry. The ICL7660 converter circuit on the MAX191 EV kit is the standard application circuit for +5V to -5V conversions. Its 10mA output capacity is much more than the 100A needed for the MAX191 EV kit. The additional current is available for user circuits in the prototyping area. For applications where the MAX191 is the only load, the 10F capacitors may be reduced to 0.1F.
Reference Circuit
The MAX191 EV kit is configured to operate with the MAX191's internal 4.096V reference, using external reference compensation mode (PD pin floating--see MAX191 data sheet). Access to the PD pin is provided via connector location JJ1. To evaluate the MAX191 in internal reference compensation mode, remove the reference compensation capacitors C7 and C11, and force the PD pin high at location JJ1. To place the MAX191 in its low-current power-down mode, connect PD to ground using JJ1.
Monitoring the MAX191 Supply Current
A jumper position (JJ2) included on the MAX191 EV kit printed circuit board provides a convenient place to monitor the MAX191's VDD supply current. To insert a current meter, cut the trace across the position marked
_______________________________________________________________________________________
3
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
JJ2 and connect the meter using the two holes present. The circuit can be returned to normal by soldering a short piece of wire between the two holes. To evaluate the MAX191 in its low-current shutdown mode, connect PD to ground using jumper location JJ1.
MAX191 RAM Resident Program
The second program supplied with the kit is an 80C32 assembly language program that is transferred to the 80C32 module and controls the MAX191 converter. Both the source code (191RAM.ASM) and hex (191RAM.MAX) files are on the floppy disk supplied with the EV kit. The hex file is downloaded automatically when communications with the module are initiated. It transmits a logon banner, displays a command prompt, and changes the lower right-hand corner of the display to indicate "**** READY ****" when program loading has been completed. The command prompt gives the present operating mode of the MAX191. It indicates the output format (DECimal or HEXadecimal), the input mode (UNIpolar or BIPolar), the interface mode (PARallel or SERial), and the MAX191 VSS voltage (0V or -5V). For example, the following command prompt indicates decimal output format, unipolar input mode, parallel interface mode, and VSS = 0V. MAX191:DEC:UNI:PAR:VSS = 0V: > Any of the following commands may be entered whenever the prompt is displayed. A command help list will appear when a question mark "?" is entered.
Analog Inputs
The MAX191's analog inputs are brought to pads marked AIN+ and AIN-. An optional input filter consisting of 1k resistors (R1 and R2) is in series with the input and a 0.01F capacitor (C10) across the input pins. A wire may be inserted across jumper JJ3 to connect AIN- to ground if the MAX191 is limited to singleended input operation.
___________________________Software
191EVKIT Program
The 191EVKIT program is one of two separate programs supplied with the MAX191 EV kit. The program, which runs on a personal computer, handles the user interface, controls communications with the 80C32 module, and displays conversion results. It was written in the C language using Microsoft's QuickC software package. The EV System Quick Start section gives instructions for starting the program as well as for making connections to the boards. The following commands are available whenever the 191EVKIT program is running. A list of these commands is displayed at the bottom of the screen. Esc..........Clears the data field and redraws the screen. Ctrl-T... ...Toggles the active serial communications port between COM1 and COM2. The active port is identified on the bottom status line. Ctrl-R... ...Changes the baud rate of the active serial port. The board and program initialize at 1200. If the program is exited with another rate active, the board must be manually reset. Higher baud rates are usable for data uploading and on personal computers with faster video operations. Data will be lost if the rate is set too high. Ctrl-U... ...Downloads the RAM resident program. Can be used to force reloading of the RAM resident program. Ctrl-X... ...Exits the 191EVKIT program and returns to DOS.
______________Software Commands
The following commands are available whenever the MAX191 RAM resident program has been downloaded to the 80C32 module. Entering a question mark "?" produces a help list.
MAX191 Conversion-Mode Selection Commands
U .............The MAX191 interprets the input as a unipolar (0V to +4.096V) voltage. B .............The MAX191 interprets the input as a bipolar (-2.048V to +2.047V) voltage. P............Changes the interface mode between the 80C32 and the MAX191 to parallel. S............Changes the interface mode between the 80C32 and the MAX191 to serial. V .............Sets the MAX191 VSS voltage to -5V. The -5V supply must be used when the MAX191 input is expected to go negative. Z .............Sets the MAX191 VSS voltage to 0V.
4
_______________________________________________________________________________________
MAX191 Evaluation System/Evaluation Kit
H .............Changes the format of the displayed results. For hexadecimal format, the range is 0 to FFFF (0 to full scale) for unipolar mode, and 8000 to 7FFF (negative full scale to positive full scale) for bipolar. D ............Changes the format of the displayed results. For decimal format, the range is 0V to +4.096V for unipolar and -2.048V to +2.047V for bipolar. R .............Collects conversion results in the RAM located on the 80C32 module. See the following commands for details. O ...........Retrieves previously stored values in the 80C32 module RAM and displays the results. Changing the MAX191 conversion mode (unipolar/bipolar) after conversions are collected will cause an erroneous display. N ............Sets the number of readings collected with the "R" command and displayed with the "O" command between 1 and 4100. W ............Sets the period between conversions as they are collected and stored in the RAM. Each count increases the delay by approximately 2s. The delay period also occurs between conversions following the "L" command. F..............Retrieves the contents of the 80C32 RAM and stores the readings in a file. The readings are stored in text (ASCII) format with a single reading per line. The output file may be viewed with a wordprocessing program or imported by a spreadsheet program.
Evaluates: MAX191
MAX191 Conversion Commands
CR ..........Striking the carriage return (the "Enter" key on the PC keyboard) or the space bar performs a single conversion and displays the results. C............Performs continuous conversions and displays the results until any key on the keyboard is pressed. L ..........Performs continuous conversions and ignores the results. This allows the user to observe the timing relationships with an oscilloscope. The function terminates when a key is pressed.
_______________________________________________________________________________________
5
Evaluates: MAX191
16
15
U2C DG413
1 2 3 C1 200pF C2 10F C8 0.1F 24 VDD 23 CLK/SCLK AINVREF JJ3 C11 0.1F C12 0.1F C9 0.1F C3 10F JJ1 1 FC 21 HBEN VREF 5 1Y 4 19 RD AIN- 4 1k AIN+ 3 AIN+ R1 C10 0.01F R2 1k
8 7
-RD 2Y 7 20 CS
J1-9
C7 22F LOW ESR
9 10
-CS0 DB7 J1-26 J1-25 J1-24 J1-23 J1-22 J1-21 J1-20 J1-19 10 D0/D8 DGND 12 11 D1/D9 BUSY 9 13 D2/D10 PAR 22 14 D3/D11 15 D4 BIP 8 16 D5/SSTRB PD 1 17 D6/SCLKOUT AGND 7 DB6 DB5 DB4 DB3 +5V RS1 DB1 DB0 2 3 4 5 6 7 8 9 10 10k DB2 11 3A 10 3B 4Y 12 14 4A 13 4B
J1-11
5 2A 6 2B 3Y 9 18 D7/DOUT VSS 2
TESTPOINT
U3 MAX660
V+ 8 C4 10F 3 GND 2 CAP+ OSC 7 LV 6 4 CAP- OUT 5 C5 10F C6 10F +5V
H1-1
P1.0 SCK J1-27 +5V +5V +5V J1-8 J1-7 C13 10F GND GND GND GND H1-2 H1-3 H1-4 H1-5 H1-6 H1-7 H1-8 H1-9 H1-10 J1-1 J1-2 J1-3 J1-4 C14 0.1F
P1.1 VSEL J1-28
P1.2 BSY J1-29
P1.3 PAR J1-30
P1.4 BIP
J1-31
P1.5 HBE J1-32
P1.6 SDAT J1-33
MAX191 Evaluation System/Evaluation Kit
_______________________________________________________________________________________
U2B DG413
JJ2 14 +5V
P1.7 SCS J1-34
10-PIN HEADER
11
MAX191
6
Figure 1. MAX191 EV Kit Schematic
U1 74HCT157
15 1 A/B G 2 1A 3 1B
6
U4
REFADJ 6
+5V
TESTPOINT
U2A DG413
U2D DG413
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
Figure 2. MAX191 EV Kit Component Placement Guide
_______________________________________________________________________________________
7
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
Figure 3. MAX191 EV Kit Component-Side Layout
8 _______________________________________________________________________________________
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
Figure 4. MAX191 EV Kit Solder-Side Layout
_______________________________________________________________________________________
9
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
____80C32 Module Component List
DESIGNATION C1, C2 C4, C5, C6, C7, C8, C9, C10, C11, C12 C3, C13, C14 D1 J1 J2 R1 RS1 SW1 SW2 IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC8 IC9 IC10 Y1 None None None None QTY 2 9 DESCRIPTION 15pF ceramic capacitors 0.1F, 50V ceramic capacitors 22F, 16V radial electrolytic capacitors 1N4001 diode 40-pin right-angle male connector DB9 right-angle socket 620 resistor Reset switch Reset switch 80C32 MAX233CPP MAX233CPP 27C64 74HCT573 74HCT139 74HCT08 74HCT245 62256 78M05 MAX707CPA 11.059MHz crystal 2-pin power connector 28-pin 600-mil socket for IC3 (the EPROM) Rubber feet 3.00" x 5.50" PC board
3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 4 1
The module is connected to an IBM-compatible personal computer over a serial communications port. Software provided with each EV kit runs on the computer and controls the unit consisting of the 80C32 module and EV kit. The program uses a routine stored in the 27C64 EPROM to download special 80C32 code for each kit. The downloaded code controls the EV kit and, together with the program running on the personal computer, displays the output data. The board operates from a single 8V to 22V supply. Both the pre-regulated and regulated +5V levels are available to the EV kit through the 40-pin connector.
80C32 Module Power Supply
The Maxim 80C32 module requires an input of 8V to 22V for normal operation. An on-board 78M05 power regulator supplies the 5V required for the logic on the module, and any 5V requirements for the EV kit attached to the 40-pin connector. The pre-regulated voltage is also available on the data connector. The source must be capable of supplying 100mA for the module and meeting the load requirements of the EV kit.
Microprocessor Supervisor
A MAX707 on the module monitors the 5V logic supply, generates the power-on reset, and produces a reset pulse whenever the reset button is pressed. A watchdog function was not included because they frequently interfere while debugging programs, and debugging is a prime function of this board.
80C32 Microcontroller
The 80C32 is a member of the popular Intel 8051 family of Cs. It is a low-power CMOS version that requires external ROM for program storage, 256 bytes of internal RAM, and four 8-bit I/O ports. Three of the ports are required by the system for serial communications and memory control. The fourth port (P1) is available through the data connector. The 80C32 communicates with the PC over a serial RS232 link. A MAX233 acts as a level shifter between the 15V RS-232 signals and the TTL levels of the 80C32. The MAX233 also generates the output voltages necessary to drive RS-232 lines.
______________________80C32 Module
80C32 Module General Description
The Maxim 80C32 microcontroller (C) module is intended for use with this and other Maxim evaluation kits (EV kits). It contains the 80C32 C, RS-232 interface, 8kbytes of EPROM, 32kbytes of static RAM, and address decoding logic. A 40-pin connector mates with a connector found on Maxim EV kits designed to interface with the 80C32 module.
10
______________________________________________________________________________________
MAX191 Evaluation System/Evaluation Kit
Port 0 (pins 32-39) of the 80C32 multiplexes the lower eight bits of memory address and the eight bits of read/write data. The lower eight bits of address data are latched during each I/O cycle by the 74HCT573 octal latch. The latch is controlled by the address latch enable (ALE) signal of the 80C32. Port 2 (pins 21-28) of the 80C32 supplies the upper eight bits of address information. The port 3 pins (10-17) provide several unrelated functions. Pins 10 and 11 are used as the receive data (RxD) and transmit data (TxD) pins of the RS-232 link. Pins 16 and 17 act as the write (WR) and read (RD) control signals for the data I/O cycles. Four other pins are configured as interrupt and timer controls, but are not used on this board.
Address Ranges
Logic on the module board generates various enable signals for different address ranges. The ROM and RAM enable signals are fed directly to the respective chips. Several additional signals (CS0-CS3) are available on the data connector to be used by Maxim EV kits. Table 2 outlines the address range for each of the elements found on the 80C32 module.
Evaluates: MAX191
Table 2. Address Ranges in Hexadecimal
ADDRESS RANGE (HEX) 0000 4000 C000 D000 E000 F000 3FFF BFFF CFFF DFFF EFFF FFFF ENABLE SIGNAL ROM RAM CS0 CS1 CS2 CS3
Memory
The board has a 27C64 EPROM containing code for initializing the 80C32 and downloading additional program code to the 62256 RAM. After a reset, the EPROM resident code initializes the 80C32, determines the address range of the RAM, sets the RS-232 baud rate to 1200, and waits for communications from the PC. Receiving any character will prompt the program to send an initial banner that includes the program name, revision level, and boundaries of the on-board RAM. The 62256 CMOS (32kbyte) static RAM is used to hold program code for the various Maxim EV kits that use the 80C32 module as the controller. Programs are transferred from disk to the RAM using software running on a personal computer, such as MAXLOAD or other programs provided with Maxim EV kits. Programs written to execute from this RAM start at 4000 (HEX) and are typically less than 4kbytes long. The remaining RAM is available for data storage.
Data I/O Connector
A 40-pin connector mounted on the edge of the printed circuit board provides connection between the C module and other Maxim EV kits. Both power and digital signals are transferred via the connector. To join the module board with an EV kit, carefully align and insert the pins on the connector with the mating 40-pin female connector of the kit. The pin functions are listed in Table 3.
Table 3. I/O Connector Pin Functions
PIN 1-4 5, 6 7, 8 9 10 11 12 13 14 15-18 19-26 27-34 35-40 FUNCTION Ground Pre-regulator input Regulated +5V RD WR CS0 CS1 CS2 CS3 ADDR0-ADDR3 DB0-DB7 P1.0-P1.7 Reserved DESCRIPTION
Read strobe Write strobe Address C000-CFFF Address D000-DFFF Address E000-EFFF Address F000-FFFF Lowest 4 bits of address 8-bit data bus 8 bits of port 1
______________________________________________________________________________________
11
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
Software Architecture
Software for EV kits using the Maxim 80C32 module is divided into three elements: the interface program running on an IBM-compatible PC, a module program located in EPROM, and a program supplied on disk that is transferred to the RAM located on the module. Immediately following transmission of the logon banner, the program runs a checker routine for the on-board 256kbit static RAM. The RAM is filled with several patterns and then read to verify that each pattern has been retained. A pass or fail indication is displayed on the personal computer after each pass. EV kit software requires proper operation of the RAM. Do not attempt to use the board if any of the RAM checks fail. Two other programs for the EV kits are provided on a floppy disk shipped with each kit. One program acts as the user interface and transmits commands to the 80C32 module. The other is an 80C32 application program that executes from the RAM located on the module. The procedure for loading the programs varies with each kit, so follow the instructions provided.
EPROM Resident Program
The EPROM resident program initializes the 80C32, establishes communications over the RS-232 link, verifies the static RAM, and downloads other programs. Its operation starts on power-up and whenever the reset button is pressed. After reset, the program waits indefinitely to receive a character over the RS-232 port. When the first character is received, a logon banner identifying the module and firmware revision is transmitted.
Figure 5. 80C32 Module Component Placement Guide (x2)
12 ______________________________________________________________________________________
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
34 ALL D9 MNEMONICS REFER TO THE HOST (DTE)
5 1 4 6 GND
P1.0-P1.7 27-34 27
DCD DTR DSR
2 3 7 8
TXD RXD RTS CTS
MAX233A U2 +5V 2 +5V 5 T1 2 OUT T1IN 18 T2 1 OUT T2IN 3 4 R1 R1 19 R2IN R2OUT 20 OUT 11 IN 8 C1+ C2+ 15 13 C1C2+ 10 V- 12 C216 17 VC2V+ 14 GND GND 6 9
1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 17 9
P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RXD TXD -INT0 -INT1 T0 T1 -WR -RD RST
AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 ALE -EA A15 A14 A13 A12 A11 A10 A9 A8
39 38 37 36 35 34 33 32 30 31 28 27 26 25 24 23 22 21
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
11 21 Q1 3 D1 4 74HCT 5 573 6 U4 7 D 8 9 D8 Q8
MAX707 +5V U10 1 MR RESET 2 RESET V SW1 3 CC GND N.C. RESET 4 PFO PFI
8 7 6 5
XTAL2 29 XTAL1 -PSEN XX1 11.059MHz C2 1 U6 HCT08 27pF 3 2 +5V 4 U6 HCT08 6 +5V 12 5 19 11 13 U6 HCT08
C1 27pF18
15 14 13 12 11 10 9 8
19 0 0 18 1 1 17 2 2 16 3 3 15 4 4 14 5 5 13 6 6 12 7 7 8 9 10 11 12 13
10 9 8 7 6 5 4 3 25 24 21 23 2 26 22 20
A0 O0 A1 O1 A2 O2 A3 O3 A4 O4 A5 O5 A6 O6 A7 O7 A8 27C64 A9 U3 A10 A11 VPP A12 N.C./A13 PCM C E
11 12 13 15 16 17 18 19
+5V 1 27
14 2 A0 0 3 A1 U5 1 15 HCT139 2 1 EN 3
4 5 6 7
9 U6 HCT08 8 10
Figure 6. 80C32 Module Schematic
______________________________________________________________________________________
13
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
+5V U8 62256 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 10 9 8 7 6 5 4 3 25 24 21 23 2 26 1 20 22 27 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 -CS -OE -WR I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7 I/O8 11 12 13 15 16 17 18 19 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 RS1 1 19 2 A1DIR EN B1 3 4 74HCT 5 /245 6 U7 7 H 8 9 A8 B8 18 17 16 15 14 13 12 11 10k
0 1 2 3
ADDR0-4 15-18
DB00-DB07 19-26
12 13
14 A0 13 A1
12 0 11 LS139 1 10 2 U5 15 9 EN 3
-CS0 - -CS3 11-14 -RD 9 -WR 10
RESERVED 35-40 +5V +5V 7-8 V++ 5-6 SW2 POWER SWITCH VIN POWER CONNECTOR C14 47F GND GND 1-4
POWER LED
R1 620
+
C4-C12 0.1F
+
78M05 U9 VOUT VIN
C3 47F
C13 47F
Figure 6. 80C32 Module Schematic (continued)
14
______________________________________________________________________________________
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
Figure 7. 80C32 Module Component-Side Layout (x2)
______________________________________________________________________________________
15
MAX191 Evaluation System/Evaluation Kit Evaluates: MAX191
Figure 8. 80C32 Module Solder-Side Layout (x2)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX191EVKIT

	To Download MAX191EVKIT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .