CY3240-I2USB I2C-USB Bridge Guide, Doc. # 001-66660 Rev.**
29
Hardware
Figure 4-8. I2C Slave Interface Schematic
4.2.6
Demo Target Board
The target board is used to light up the two LEDs on receiving data from host and transfer the data,
acquired from photo diode to host.
PSoC device (CY8C21123) is used to control the two LEDs based on input from the host using
Bridge Control Panel. The PSoC device updates the I2C register with the sensor information, which
can be read by any I2C master.
Table 4-3. CY8C21123 Pin Connectivity
Pin No.
Port No
Description
6
P0[4]
LED1
7
P0[2]
LED2
1
P0[5]
Photo-diode
8
P1[0]
Voltage supply
3
P1[1]
Ground
2
P0[3]
Interrupt
5
Vcc
Serial clock
4
GND
Serial data
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