Cypress Semiconductor CY8C24894 Uživatelský manuál stáhnout pdf (Strana 15)

CY3240-I2USB I2C-USB Bridge Guide, Doc. # 001-66660 Rev.** 15

3. Kit Operation

3.1 Introduction

The device meets the requirements of I2C Specification for standard and fast speed I

C devices,

and supports USB HID devices. The bridge is powered by the USB and consumes less than

500 mA. The device can be configured for several I

C clock rates such as 50 kHz, 100 kHz, and

400 kHz.

The number of devices that can be connected is constrained only by the I

C address limit and phys-

ical ability of the I

C bus. For more details, see the I2C Specifications.

The USB communication function uses two 64-byte packets: one for input data flow and the other for

output data flow. The maximum bandwidth of this configuration is 64 bytes. This is sufficient for most

I2C-USB bridge applications (Figure 3-1).

Figure 3-1. I2C-USB Bridge

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Cypress Semiconductor CY8C24894 Uživatelský manuál Strana 15