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Hardware UM0559
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2.8 RS232 serial interfaces
Two general purpose, asynchronous serial I/O data ports are connected through 9-pin D-
type male connectors refer to
Section 3.2: RS232 serial data connector on page 14 .
RS232-A connects directly to UART0, transmit and receive only. RS232-B connects to
UART1, transmit and receive only.
RTS is shorted to CTS and DTR is shorted to DSR at the connector for both interfaces.
2.9 Analog input
The following analog inputs are provided, see the schematics Figure 10 on page 19 :
●
LM35 temperature sensor IC9 is connected to AIN1,
●
variable resistor R33 is connected to AIN0.
2.10 LEDs
2.10.1 Software controlled LEDs
The LEDs in Table 1 are software controlled by PIO pins.
Table 1. Software controlled LEDs
LED Connected to Color Schematic
LD1 P4_0
Red Figure 15 on page 24
LD2 P4_1
LD3 P4_2
LD4 P4_3
LD5 P4_4
LD6 P4_5
LD7 P4_6
LD8 P4_7
LD9 P4_8
LD10 P4_9
LD11 P4_10
LD12 P4_11
LD13 P4_12
LD14 P4_13
LD15 P4_14
LD16 P4_15