EVB90601 Melexis Inc, EVB90601 Datasheet - Page 40

• Manufacturer Part Number: EVB90601
• Description: EVALUATION BOARD MLX90601 IR MOD
• Manufacturer: Melexis Inc

Specifications of EVB90601

• Rohs Status: RoHS non-compliant

User Manual
EVB90601 Configuration Board
The microcontroller (U1) PIC18F252 (Microchip) is used to convert the PC application software
commands to the module’s SPI commands and to return the module’s replies back to the PC
software. The microcontroller uses its built-in UART port for communication with the PC.
The USB to UART conversion is accomplished by the FT232BM (FTDI Chip) IC (U2). From the
PC application software point of view the USB to UART converter IC remain invisible; the EVB
is accessed as a standard RS-232 device, while the physical media is the USB interface.
The corresponding Virtual COM Port Drivers provided by FTDI Chip (available for most of the
existing operating systems) must be previously installed (see the Appendix B).
The data written in the external EEPROM 93C46 (U3) is used to customize the USB VID, PID,
Serial Number, Product Description String and Power Descriptor value of the FT232BM. This
data during the USB link establishment and it is not used by the EVB’s microcontroller.
The LED D2 indicates the data transfer (receive and transmit) via USB.
User interface
Initially, the symbols sent to the EVB via the virtual RS-232 are echoed if the jumper JP1
(‘ECHO’) is shorted and NOT echoed if the jumper JP1 is open. Further, during the normal
operation the echoing could be enabled or disabled by the software.
The ECHO mode is convenient for manual operations, when a standard terminal emulation
program is used to type different commands to the evaluation board. If the EVB is to be used
with dedicated PC application software to configure, calibrate or recalibrate the module, then the
NO ECHO mode could be preferred.
The settings of the PC virtual serial RS-232 port must be the following:
Baud rate: 115200
Data bits: 8
Parity: None
Stop bit: 1
Flow control: None
All the commands supplied from the PC to the EVB are text (ASCII) statements ending with a
carriage return symbol (CR). The syntax is the following (1 command and up to 4 arguments):
command [argument1] [argument2] [argument3] [argument4] <CR>
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Page 40
Jan-04
Rev 005