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Introduction
The uM-FPU64 28-pin breakout board has all of the required connections, and provides access to all uM-
FPU64 pins. It can be used as a development board or for permanently mounting in a project.
The features include:
•
all required connection for the uM-FPU64
•
interface selector and connector with resistors for SPI or I
•
serial connector for access to SERIN and SEROUT pins
•
serial connector is compatible with SparkFun FDTI 3.3V Basic Breakout and
•
Power or Busy Status LED
•
space provided for RTC oscillator and capacitors
•
breakout connector for D0-D4
•
breakout connector for D5-D8 and AN0-AN5
•
optional I
C pull-up resistors for D0 and D1
2
•
board can be powered from USB during development
Bare uM-FPU64 28-pin Breakout Board
Micromega Corporation
uM-FPU64
Floating Point Coprocessor
28-pin Breakout Board
2
C connections
1
Parallax PropPlug
Revised 2013-07-03
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Table of Contents
Summary of Contents for Micromega uM-FPU64
- Page 1 28-pin Breakout Board Introduction The uM-FPU64 28-pin breakout board has all of the required connections, and provides access to all uM- FPU64 pins. It can be used as a development board or for permanently mounting in a project. The features include: •...
- Page 2 The breakout board can be configured to draw power from the serial connector 3.3V pin, or the interface connector 3.3V pin. The interface connector should be used for power when connecting the uM-FPU64 to other components, since the serial connector can only supply a limited amount of current. Using the serial...
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Page 3: Spi Interface
POWER 28-pin 4.7K 4.7K 10 uF .1uF 3.3V D1-I2C DO-I2C SCLK uM-FPU64 SOUT 3.3V RES EN .1uF 22pF 330 330 32.768 kHz 22pF GND MCL AN0 AN1 D5 SEL Jumper Select SPI Interface Micromega Corporation uM-FPU64 28-pin Breakout Board... - Page 4 No resistors are installed when using an SPI 3-wire interface. Interface Connector Microcontroller 3.3V 3.3V SCLK SOUT/SDA MISO SIN/SCL MOSI SPI 2-wire Interface The 1K resistor is installed when using an SPI 2-wire interface. Interface Connector Microcontroller 3.3V 3.3V SCLK SOUT/SDA SIN/SCL DATA Micromega Corporation uM-FPU64 28-pin Breakout Board...
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Page 5: Serial Connection
SIN/SCL Serial Connection The serial connector is used to connect to the SERIN and SEROUT pins of the uM-FPU64. The pinout of the connector has been designed to be compatible with two commonly available USB to serial interface boards: SparkFun FDTI Basic Breakout - 3.3V (SparkFun part number DEV-08772) A 6-pin right-angle 0.1”... - Page 6 SOUT 3.3V RES EN .1uF 22pF 330 330 32.768 kHz 22pF GND MCL AN0 AN1 D5 Serial Connector SparkFun Parallax FDTI Basic 3.3V Prop Plug 3.3V 3.3V Example using FDTI Basic Breakout - 3.3V Micromega Corporation uM-FPU64 28-pin Breakout Board...
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Page 7: Other Connections
DO-I2C Enabled 4.7K 4.7K D1-I2C DO-I2C RTC Crystal Oscillator If the uM-FPU64 real-time clock is used, the 32.768 kHz crystal and two 22pF capacitors must be installed. 22pF 22pF 22pF 32.768 kHz 22pF D0-D4 Breakout Connector A 7-pin connector is provided for the D0-D4 pins. -
Page 8: Schematic Diagram
D8/AN5 /BUSY Note: Since /MCLR is connected to 3.3V through a 10K pull-up resistor, the uM-FPU64 can be reset by briefly connecting the MCL pin to ground. Since the GND pin is next to the MCL pin, a post shunt can easily be used to briefly connect MCL to GND. -
Page 9: Parts List
Parts List The parts for the uM-FPU64 breakout board are listed below, with Digi-Key part numbers included for reference purposes. All of the parts can be replaced with equivalent parts from other suppliers, and many of the parts may already be in your parts bin. Some parts can be omitted depending on the interface connection and the options selected.
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