C P 2 1 0 5 - E K
4
Rev. 0.5
6. Target Board
The CP2105 Evaluation Kit includes an evaluation board with a CP2105 device preinstalled for evaluation and pre-
liminary software development. Numerous input/output (I/O) connections are provided to facilitate prototyping using
the evaluation board. Refer to Figure 3 for the locations of the various I/O connectors.
P1
USB connector for USB interface
P2
DB9 connector for Standard RS232 interface
P3
DB9 connector for Enhanced RS232 interface
J1
Enhanced UART signal access connector
J2, J3
GPIO access connector
J4
Power connector
J6
Standard UART signal access connector
J7, J8
SUSPEND LED source connector
DSS–DS4
Green GPIO LEDs
DS5
Red SUSPEND indicator LED
Figure 3. CP2105 Evaluation Board with Default Shorting Blocks Installed
6.1. LED Headers (J2, J3)
Connectors J2 and J3 are provided to allow access to the GPIO pins on the CP2105 when in GPIO mode. Place
shorting blocks on J2 and J3 to connect the GPIO pins to the five green LEDs DS0–DS4. These LEDs can be used
to indicate active communications through the CP2105. Table 1 shows the LED corresponding to each header
position. When using the CP2105 in Modem mode, the shorting blocks on J2 and J3 should be removed.
Table 1. J2 and J3 LED Locations
LED
Pins
DS0
J2[1:2]
DS1
J2[3:4]
DS2
J3[1:2]
DS3
J3[3:4]
DS4
J3[5:6]
P2
CP2105
P1
SUSPEND LED
J1
Pin 2
Pin 1
J4
______
DS5
RS232
Transceiver
J6
Pin 1
RS232
Transceiver
P3
CP2105-EK
Standard
Enhanced
Pin 2
J8
J7
J3
DS0
DS1
J2
DS2
DS3
DS4
