Silicon Laboratories CP2104, Руководство пользователя

Страница: 4 / 8

C P 2 1 0 4 - E K
4 Rev. 0.7
6. Evaluation Board
The CP2104 Evaluation Kit includes an evaluation board with a CP2104 device pre-installed 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 RS232 interface
 J1 UART signal access connector
 J2, J3 GPIO access connector
 J4 Power connector
 DS0–DS3 Green GPIO LEDs
 DS4 Red SUSPEND indicator LED
Figure 3. CP2104 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 CP2104. Place shorting blocks on J2
and J3 to connect the GPIO pins to the four green LEDs DS0–DS3. These LEDs can be used to indicate active
communications through the CP2104. Table 1 shows the LED corresponding to each header position.
6.2. Universal Serial Bus (USB) Interface (P1)
A Universal Serial Bus (USB) connector (P1) is provided to facilitate connections to the USB interface on the
CP2104. See Table 2 for the USB pin definitions.
Table 1. J2 and J3 LED Locations
LED Pins
DS0 J3[3:4]
DS1 J3[1:2]
DS2 J2[3:4]
DS3 J2[1:2]
Table 2. USB Connector Pin Descriptions
Pin # Description
1 VBUS
2 D-
3 D+
4 GND (Ground)
P2
CP2104
P1
SUSPEND LED
J1
Pin 2
Pin 1
J3
J4
J2
DS3
DS2
DS1
DS0
_________
DS4
RS232
Transceiver