C8051F02x-DK
Rev. 0.6
7
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 C8051F020. 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 the transceiver.
J9
- Install shorting block to connect UART0 RX (P0.1) to the transceiver.
J8
- Install shorting block to connect UART0 RTS (P4.0) to the transceiver.
J10 - Install shorting block to connect UART0 CTS (P4.1) to the transceiver.
6.5. Analog I/O (J11, J20)
Several C8051F020 analog signals are routed to the J20 terminal block and the J11 connector. Header J11 pro-
vides 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 connec-
tions and Table 4 for J11 pin definitions.
Table 3. J20 Terminal Block Pin Descriptions
Pin #
Description
1
CP0+
2
CP0-
3
DAC0
4
DAC1
5
AIN0.0
6
AIN0.1
7
VREF0
8
ADND (Analog Ground)
Table 4. J11 Connector Pin Descriptions
Pin #
Description
1
CP0+
2
CP0-
3
DAC0
4
DAC1
5
CP1+
6
CP1-
7
AIN0.0
8
AIN0.1
9
DAC0
10
DAC1
11
AIN0.6
12
AIN0.7
