Texas Instruments CC1110-CC1111DK, User Manual

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CC1110/CC2510
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5.2 USB MCU signal names
The USB MCU is a C8051F320 from Silicon Labs. Please see the Silicon Labs web site for
detailed information about this MCU.
The following table shows the usage of I/O pins on the USB MCU.
Pin
no. Pin name
(USB MCU) Signal name
SmartRF
®
04EB
0-ohm
resistor Function
1 P0.1 P1.7/SO/GDO1/MISO R117 SPI MISO signal,
transceiver/transmitter SO/GDO2
2 P0.0 P1.5/SCLK R115 SPI Serial clock
10 P3.0/C2D USB MCU Debug pin
11 P2.7 P1.3/LED3 R113 LED3 (yellow), active low
12 P2.6 P0.4/RTS R100
13 P2.5 RS232_POWER Turns RS-232 level converter on/off
14 P2.4 P2.0/LED_4 R120 LED4 (Blue), active low
15 P2.3 RESET_N LCD Power on reset signal, SoC
RESET
16 P2.2 SOC_PRESENT Tells USB MCU whether a SoC is
present.
0 = transmitter/transceiver
1 = SoC
17 P2.1 P0.6/JOY R106 Joystick input (analogue coded
voltage)
18 P2.0 P1.2/LED2 R111 LED2 (Red), active low
19 P1.7 P1.0/LED1 R110 LED1, (Green), active low
20 P1.6 P0.7/POT R107 Potentiometer input
21 P1.5 P0.5/JOY_PUSH R112 Joystick pushed
22 P1.4 P1.1/PWM_OUTPUT R105 PWM audio output
23 P1.3 P0.1/BUTTON_PUSH R101 Button pushed
24 P1.2 P0.0/MIC_INPUT R104 Audio input
25 P1.1 P2.4/SCL R124 I2S clock (for LCD)
26 P1.0 P2.3/SDA R123 I2S data (for LCD)
27 P0.7 P2.2/GDO2/DC R122 Transceiver/transmitter GDO3, SoC
debug signal
28 P0.6/CNVSTR P2.1/GDO1/DD R121 Transceiver/transmitter GDO1, SoC
debug signal
29 P0.5 P0.2/UART_RD R102 UART RD
30 P0.4 P0.3/UART_TD R103 UART TD
31 P0.3/XTAL2 P1.4/CSn/SS R114 SPI slave select signal
32 P0.2/XTAL1 P1.6/MOSI R116 SPI MOSI signal,
Transceiver/Transmitter SI
Table 1: USB MCU pin-out
As mentioned in the table, the joystick output is coded as an analogue voltage. This has been
done in order to save the number of pins required on the MCU to interface with the joystick.
The SoC software libraries contain functions to decode the ADC values and indicate in what
direction the joystick is moved. The push function of the joystick is treated as a separate
digital signal.