MAXQ3120-KIT MAXIM | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 9

Technical content

Features

♦ Easily Loads Code Using Bootstrap Loader and Serial-to-JTAG Interface Board ♦ JTAG Interface Provides In-Application Debugging Features Step-by-Step Execution Tracing Breakpointing by Code Address, Data Memory Address, or Register Access Data Memory View and Edit ♦ Static 3.5 Digit LCD Display Driven Directly by MAXQ3120 ♦ On-Board 3.3V Power-Supply Regulator ♦ EV Kit Board can be Powered Directly Over JTAG Interface or from DC Power Supply ♦ Indicator LED Driven from Port Pin P0.6 ♦ Pushbuttons for Reset, Three GPIO Inputs and One External Interrupt ♦ RS-232 Interface Included on Serial Port 1 ♦ Included Full Board Schematics Provide a Convenient Reference Design Evaluates: MAXQ3120 MAXQ3120 Evaluation Kit LCD RESET MAXQ3120-FFN+ POWER LED USER SERIAL PORT PROTOTYPE AREA JTAG INTERFACE CABLE JTAG INTERFACE BOARD 5V POWER CONNECTOR SERIAL DEBUG PORT Rev 0; 10/05 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAXQ is a trademark of Maxim Integrated Products, Inc. Windows is a registered trademark of Microsoft Corp. Figure 1. MAXQ3120 Evaluation Kit Setup

Ordering Information

MAXQ3120-KIT MAXQ3120 EV Kit Board

Figure 2. MAXQ3120 Serial-to-JTAG Interface

  • MAXQ3120 Data Sheet (www.maxim-ic.com/MAXQ3120)
  • MAXQ Family User’s Guide (www.maxim-ic.com/MAXQUG)
  • MAXQ312x User’s Guide Supplement (www.maxim-ic.com/MAXQ3120UG) The MAXQ3120 EV kit board is fully defined in the included schematic. However, a short description of the major components and connectors of the boards follows. Power Supplies There are three ways to set up power supplies when using the MAXQ3120 EV kit. The two boards that require power supplies are the MAXQ3120 EV kit board and the serial-to-JTAG interface board.

Figure 3. MAXQ3120 Evaluation Kit Functional Layout

3.5 DIGIT x 7-SEGMENT LCD

connect supplies as follows.

  • Connect a 5V ±5% regulated DC wall supply to the J2 power plug of the serial-to-JTAG interface board.
  • Connect a 3.3V regulated bench supply to test points V CC and GND on the MAXQ3120 EV kit board. Note: When using two power supplies in this man- ner, the JP3 jumper on the serial-to-JTAG board must be DISCONNECTED. Running Both Boards from a Single Power Supply If the serial-to-JTAG interface board is being used, a single power supply can be used to power both boards as follows.
  • Connect a 5V ±5% regulated DC wall supply to the J2 power plug of the serial-to-JTAG interface board.
  • Connect the JH3 jumper on the serial-to-JTAG inter- face board. Note: Do not connect a power supply to the test points on the MAXQ3120 EV kit when powering the boards in this manner. Running the MAXQ3120 EV Kit Board from a Single Power Supply If the MAXQ3120 has already been programmed using the JTAG interface, it is possible to disconnect the seri- al-to-JTAG board and power-up the MAXQ3120 EV kit board on its own. This simply executes the previously loaded firmware, with no possibility of in-application load or debugging.
  • Connect a 3.3V regulated bench supply to test points V CC and GND on the MAXQ3120 EV kit board. Internal Power Rail If the MAXQ3120 EV kit is powered from the serial-to- JTAG board, it generates a 3.3V internal power rail from the 5V DC input power supply. This supply can be used to provide up to 100mA to circuitry on the proto- typing area. Using the LCD The LCD included on the MAXQ3120 EV kit is a static (nonmultiplexed) 3V display with 3.5 digits of 7 seg- ments each (Figure 4). When the LCD controller is configured to static mode, the display’s segments are memory mapped as noted in Table 1. (Refer to Table 29 in the MAXQ312x Supplement for more details.) MAXQ3120 Evaluation Kit

Figure 4. LCD Configuration Table 1. LCD Memory Map (Static)

1 TCK

Figure 5. MAXQ3120 Evaluation Kit Power Schematics—Power, Headers (Sheet 1 of 4)

Figure 6. MAXQ3120 Evaluation Kit Power Schematics—Processor (Sheet 2 of 4)

21 SEG15

22 SEG20

23 SEG21

24 SEG9

25 SEG8

26 SEG13

27 SEG7

28 SEG23

29 SEG1

30 SEG0

31 SEG5

39 SEG26

1 RST

Figure 7. MAXQ3120 Evaluation Kit Power Schematics—LCD, Switches (Sheet 3 of 4)

2 VCC

7 R1OUT

2 JP5

Figure 8. MAXQ3120 Evaluation Kit Power Schematics—Serial (Sheet 4 of 4)

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. is a registered trademark of Dallas Semiconductor Corporation.

2 PIN

Figure 9. MAXQ3120 Evaluation Kit JTAG Board Schematic