Silicon Laboratories C8051F500, User Manual

C8051F500DK

12

Rev. 0.1

8.6.  Serial Interface (P5)

A USB-to-UART bridge circuit (U5) and USB connector (P5) are provided on the target board to facilitate serial
connections to UART0 of the C8051F500 (Side A). The Silicon Labs CP2102 USB-to-UART bridge provides data
connectivity between the C8051F500 and the PC via a USB port. The TX and RX signals of UART0 may be
connected to the CP2102 by installing shorting blocks on header J17. The shorting block positions for connecting
each of these signals to the CP2102 are listed in Table 3. To use this interface, the USB-to-UART device drivers
should be installed as described in Section 3.2. "CP210x USB to UART VCP Driver Installation‚" on page 2.

8.7.  CAN Interface and Network (TB2)

Both MCUs on the target board are connected to CAN transceivers through headers. The port pins assigned to the
CAN peripheral on each MCU are P0.6 (CAN_TX) and P0.7 (CAN_RX). The C8051F500 (Side A) is connected to
U3 through the J17 header and the C8051F502 (Side B) is connected to U4 through the J26 header. The two CAN
transceivers are connected to each other and form a CAN network. Other external devices can be connected to the
CAN network through the TB2 interface. The shorting block positions for connecting the MCUs to the CAN
transceivers are listed in Table 4. The pin connections for the external CAN devices are listed in Table 5. The CAN
transceivers are powered by the +5VREG node and connected through J8 and J14 headers.

Table 3. Serial Interface Header (J3) Description

Header Pins UART0 Pin Description

J17[9–10]

UART_TX (P0.4_A)

J17[11–12]

UART_RX (P0.5_A)

Table 4. CAN Interface Headers (J17 and J26) Description

Header Pins CAN0 Pin Description

J17[5–6]

CAN_TX (P0.6_A)

J17[7–8]

CAN_RX (P0.7_A)

J26[1–2]

CAN_TX (P0.6_B)

J26[3–4]

CAN_RX (P0.7_B)

Table 5. TB2 External CAN Interface Header Description

Pin #

 Pin Description

1

CAN_H

2

CAN_L

3

GND