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C8051F040-DK

C8051F04X DEVELOPMENT KIT USER’S GUIDE

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C8051F04x-DK

6.4. Serial Interface (J5)

A RS232 transceiver circuit and DB-9 (J5) connector are provided on the target board to facilitate serial connec-

tions to UART0 of the C8051F040. The TX, RX, RTS and CTS signals of UART0 may be connected to the DB-9

connector and transceiver by installing shorting blocks on headers J6, J8, J9 and J10.

J6 - Install shorting block to connect UART0 TX (P0.0) to transceiver.

J9 - Install shorting block to connect UART0 RX (P0.1) to transceiver.

J8 - Install shorting block to connect UART0 RTS (P4.0) to transceiver.

J10 - Install shorting block to connect UART0 CTS (P4.1) to transceiver.

6.5. Analog I/O (J11, J20)

Several C8051F040 analog signals are routed to the J20 terminal block and the J11 header. The J11 connector

provides the ability to connect DAC0 and DAC1 outputs to several different analog inputs by installing a shorting

block between a DAC output and an analog input on adjacent pins of J11. Refer to Table 3 for J20 terminal block

connections and Table 4 for J11 pin definitions.

Table 3. J20 Terminal Block Pin Descriptions

Pin #

1

2

3

4

5

6

7

8

Description

HVAIN+

HVAIN-

HVREF

DAC1

AIN0.0

AIN0.1

VREF0

ADND (Analog Ground)

Table 4. J11 Connector Pin Descriptions

Pin #

1

2

3

4

5

6

Description

AIN0.0

AIN0.1

DAC0

DAC1

AIN0.2

AIN0.3

Rev. 0.6

9

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