V60G-HOME-I
User Guide
Vayyar Confidential
Page 12 of 19
2.2.2
Digital Interface
The V60G-HOME-I models use either USB 2.0 or SPI as digital-interface, connecting the host module
to the sensor module.
The USB interface is implemented on the module using an MCU and a micro-USB connector. The SPI
interface is connected directly to the VYYR-7201-B4 chip, through a board-mounted multi-pin
connector.
Micro-Controller Unit (MCU)
Cypress’s EZ-USB FX3™ MCU integrates the USB 2.0 physical layers (PHYs), and contains a 32-bit
ARM926EJ-S microprocessor for building custom USB SuperSpeed applications. The integrated
processor contains a unit called General Programmable Interface (GPIF), which provides easy
connectivity to popular interfaces.
USB Connector
The onboard micro-USB-B 2.0 connector is used for power supply and for data transfer between the
sensor unit and the host PC. The connector supports the USB 2.0 protocol in High-Speed Mode (480
Mbps).
Figure 4: vStraw_CTPB4_I Connectivity
SPI Interface
Modules which are using SPI interface, the digital-interfaces and power supply are fed through a
dedicated connector. The exact connector used changes per specific model, for example
VBLUOK_CTPB4 uses OK-06F030-04.