Cypress Semiconductor CY8C24894 Uživatelský manuál stáhnout pdf (Strana 18)

18 CY3240 USB-I2C Bridge Guide, Doc. # 001-66660 Rev.*B

Kit Operation

Perform the following steps to connect the device to CY3240 USB-I2C Bridge, as shown in

Figure 3-2:

1. Connect GND of the device to GND of the bridge.

2. Connect the SDA and SCL lines to the bridge.

The CY3240 USB-I2C Bridge has 2.2 k pull-up resistors connected to +5 V. The INT pin is a pull-

down bidirectional pin that can be used as an additional signal between the bridge and the I2C

slave device for functions such as sleep mode control.

3. Power the device from the Vdd pin on the bridge, if it does not have its own power supply. Note

that the Vdd connection between the bridge and demo board is required, even if the board is self-

powered. Optionally, the bridge can provide 3.3 V or 5 V, or work with an externally powered

board using 2.4 V to 5.6 V.

4. When the connection between the bridge and USB is successful, the LED (green) lights up, as

shown in Figure 3-3.

Figure 3-3. Connecting Bridge to USB.

5. Open the Bridge Control Panel from the PC to work with the bridge.

3.2.1 Program USB-I2C Bridge

The CY3240 USB-I2C Bridge can be programmed using a MiniProg at the programming header of

the bridge. To use MiniProg, use the ISSP programming header (J2) on the board, as highlighted in

Figure 3-4.

Figure 3-4. ISSP Programming Header

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 63 64

Žádné komentáře

Cypress Semiconductor CY8C24894 Uživatelský manuál Strana 18