Cypress Semiconductor CY8C24894 Manuel d'utilisateur télécharger pdf (Page 25)

CY3240-I2USB I2C-USB Bridge Guide, Doc. # 001-66660 Rev.** 25

Hardware

4.2.1 PSoC CY8C24849 Chipset

The PSoC CY8C24894 on CY3240-I2USB Bridge board is pre-programmed to function as full fea-

tured, full speed (12 Mbps) USB. This device enables creating customized peripheral (I/O) configu-

rations that match the requirements of each individual application.

The PSoC device also performs the following functions:

■ Lights up LED (green) on connecting the bridge to host via USB.

■ Lights up LED (red) on external power supply to target device.

■ Acts as interface between the host and target device.

Figure 4-4. PSoC CY8C24894 Hardware Schematic

4.2.2 USB Mini B Connector

USB Mini B connector communicates between the PC and bridge. It is used to power up the bridge

and supply voltage range of 3.3 V or 5 V to target board. These plugs are always oriented down-

stream towards the USB device. It has SN65220, a single transient voltage suppressor, to provide

electrical noise transient protection to USB port.

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Cypress Semiconductor CY8C24894 Manuel d'utilisateur Page 25