TM USB-DAQ The data logger / process controller that looks like a USB flash drive to a PC Summary Features USB-DAQ is a low cost data logger and process Flash drive style PC interface. controller. In normal operation it operates autonomously, Wide range of peripheral I/O see table 1 collecting data and providing control as required. An on- Data acquisition / process control engine board real time clock is provided. Flexible instruction set When plugged into a USB port, USB-DAQ appears on 32768Hz real time clock with leap year correction and daylight savings time the PC like a removable disk. One file, CONFIG.DAT, contains the application code. This file is created on the USB 2.0 MSD plug and play - No drivers required PC from a Microsoft Excel spreadsheet. Other files may One and two chip solutions: be used for logging data. Microcontroller with internal 8KB flash memory Microcontroller and 128KB SPI memory USB-DAQ uses the Mass Storage Device (MSD) USB profile. It does not require USB driver installation, and Microcontroller and SD memory up to 1GB so is immediately compatible with present and future DIL, SOIC and SSOP packages Windows, Linux and Mac operating systems. Note: The 20-pin device has reduced functionality. USB-DAQ is generally available in 20-pin and 28-pin Table 1. Peripheral feature matrix packages. Both devices can use a 25AA1024 EEPROM -20-SS -28-SO -44-PT chip for moderate data storage (128KByte). The 28-pin USB-DAQ -20-DIL -28-DIL -40-DIL device can additionally use internal flash memory for Internal No 8K byte 8K byte data storage up to 8KByte or SD card memory and Memory 25AA1024 128K byte 128K byte 128K byte options chips up to 1GByte. A 40/44-pin device, with the same SD card/chip No to 1G byte to 1G byte capabilities as the 28-pin device but with extra I/O, can I/O pins 12 21 32 also be made available. Interrupt on edge 3 3 3 Interrupt on change 0 4 4 Applications Count / Compare / 0 2 2 Pulse Width Moduln Food and drug transportation UART (not buffered) 1 1 1 Low cost data logging SPI/I2C (as master) 1 1 1 UNI/O (as master) 12 21 32 Rapid autonomous USB product development Comparators 2 2 2 Research, development and teaching 10-bit A to D 9 10 13 Timer 8-bit 1 1 1 Firmware Factory USB Product Family Timer 16-bit 3 3 3 Product ID (hex) 0135 0134 0136 expandIO-USB I/O expander Available packages* DIL,SSOP DIL,SOIC DIL,TQFP *Devices in general distribution are USB-232, USB-SPI, USB-I2C serial bridges USB-DAQ-20-SS and USB-DAQ-28-DIL USB-DataPort high speed data transfer USB-FileSys embedded file system Firmware Factory Ltd USB-DAQ data logger 3 Plough Yard, Ground Floor London EC2A 3LP, UK USB-TEALeaf security dongle sales firmwarefactory.com support firmwarefactory.com Digital, Analog Serial Comparator & Counter, Serial I/O Memory Looks like Flash Drive Data Acquisition & Flash Drive Engine USB Process Control Engine USB-DAQ p1 of 8 26-Aug-10 USB-DAQ HW147-5 www.hexwax.comTable 3. 28-Pin Device Pinout Basic Operation Pin Name Description Media Media detect input USB-DAQ contains a FAT file system on which files can 1 Vpp TEAclipper programming pin Vpp be stored. When plugged into a Windows, Linux or Mac 2 RA0 General I/O pin PC, USB-DAQ looks like a flash drive and files can be 3 RA1 General I/O pin directly accessed without the need to install drivers or 4 RA2 General I/O pin software. The file can be stored in internal memory (8 5 RA3 General I/O pin kByte), external 25AA1024 memory (128 kByte), or SD RA4 General I/O pin 6 cards or chips up to 1 GByte. The PC can create, read, Escape Escape input pin write and delete files and subdirectories as required. 7 RA5 General I/O pin 8, 19 Vss Power ground reference In addition to functioning as a flash drive, USB-DAQ has 9 OSCA1 12MHz oscillator input a data acquisition / process control engine and a real 10 OSCA2 12MHz oscillator output time clock that allow it to function autonomously when OSCB1 32768Hz oscillator input 11 not connected to the PC. A file named CONFIG.DAT in RC0 General I/O pin (if no 32768Hz oscillator) the root directory controls the chips function when OSCB2 32768Hz oscillator output 12 operating in this mode. This file is created in a Microsoft RC1 General I/O pin (if no 32768Hz oscillator) Excel application and includes instructions to execute on MISO-M Data input from SPI memory 13 startup, and when an interrupt or real-time-clock event RC2 General I/O pin (if no external memory) occurs. USB-DAQ can read and write to up to four files 14 Vusb USB supply filter 15 D- USB data - in the root directory it does not create them, delete 16 D+ USB data+ them, or change their length. 17 RC6 General I/O pin When a file in the root directory is modified by the PC, 18 RC7 General I/O pin USB-DAQ notes the modification date and time data in 20 Vdd Regulated supply input the directory entry and use this information to set the 21 RB0 General I/O pin time on the real time clock. 22 RB1 General I/O pin 23 RB2 General I/O pin 24 RB3 General I/O pin Electrical Specifications SSn-M Slave select output to SPI memory 25 Table 2. Electrical Specifications RB4 General I/O pin (if no external memory) Operating voltage Vdd, 28-pin device 2.7V 5.5V 26 USB-S USB voltage sense Operating voltage Vdd, 20-pin device 1.8V 5.5V MOSI-M Data output to SPI memory Typical/max supply current, Vdd = 5.0 10mA / 21mA 27 RB6 General I/O pin (if no external memory) Typical/max Sleep current, Vdd = 5.0 0.1A / 2A PGC TEAclipper programming pin PGC Operating Temperature -40C to +85C SCK-M Clock output to SPI memory Refer to base MCU data sheets in the dev kit for further information 28 RB7 General I/O pin (if no external memory) PGD TEAclipper programming pin PGD Device Pinout Table 4. 20-Pin Device Pinout Pin Name Description 1 Vdd Regulated supply input 2 OSCA1 12MHz oscillator input 3 OSCA2 12MHz oscillator output RST Device reset input (active low) 4 Vpp TEAclipper programming pin Vpp 5 RC5 General I/O pin 6 RC4 General I/O pin 7 RC3 General I/O pin OSCB1 32768Hz oscillator input 8 RC6 General I/O pin (if no 32768Hz oscillator) OSCB2 32768Hz oscillator output 9 RC7 General I/O pin (if no 32768Hz oscillator) 10 SSn-M Slave select output to SPI memory 11 SCK-M Clock output to SPI memory 12 MISO-M Data input from SPI memory 13 MOSI-M Data output to SPI memory 14 RC2 General I/O pin 15 USB-S USB voltage sense RC0 General I/O pin 16 Escape Escape input pin 17 Vusb USB supply filter Figure 2, Device Pinout 18 D- USB data - PGC TEAclipper programming pin 19 D+ USB data+ PGD TEAclipper programming pin 20 Vss Power ground reference p2 of 8 26-Aug-10 USB-DAQ HW147-5 www.hexwax.com