CC3120MOD Datasheet, PDF (10/52 Pages) Texas Instruments – SimpleLink Wi-Fi CERTIFIED Network Processor Internet-of-Things Module Solution for MCU Applications

CC3120MOD
SWRS205 – MARCH 2017
www.ti.com
4.2 Pin Attributes
Table 4-1 lists the pin descriptions of the CC3120MOD module.
NOTE
If an external device drives a positive voltage to signal pads when the CC3120MOD is not
powered, DC current is drawn from the other device. If the drive strength of the external
device is adequate, an unintentional wakeup and boot of the CC3120MOD can occur. To
prevent current draw, TI recommends one of the following:
• All devices interfaced to the CC3120MOD must be powered from the same power rail as
the CC3120MOD.
• Use level-shifters between the CC3120MOD and any external devices fed from other
independent rails.
• The nRESET pin of the CC3120MOD must be held low until the V_BAT supply to the
device is driven and stable.
Table 4-1. Module Pin Attributes⁽¹⁾
PIN
DEFAULT
FUNCTION
STATE AT RESET
AND HIBERNATE
I/O TYPE
DESCRIPTION
1
GND
N/A
–
Ground
2
GND
N/A
–
Ground
4
nHIB
Hi-Z
I
Hibernate signal, active low
5
HOST_SPI_CLK
Hi-Z
I
Host interface SPI clock
6
HOST_SPI_DIN
Hi-Z
I
Host interface SPI data input
7
HOST_SPI_DOUT
Hi-Z
O Host interface SPI data output
8
HOST_SPI_nCS
Hi-Z
I
Host interface SPI chip select (active low)
11
HOST_INTR
Hi-Z
O Interrupt output
13
FLASH_SPI_MISO
Hi-Z
I
Serial flash interface: SPI data in
14
FLASH_SPI_nCS_IN
Hi-Z
O Serial flash interface: SPI chip select (active low)
15
FLASH_SPI_CLK
Hi-Z
O Serial flash interface: SPI clock
16
GND
N/A
–
Ground
17
FLASH_SPI_MOSI
Hi-Z
O Serial flash interface: SPI data out
23
SOP2
Hi-Z
–
SOP[2:0] used for factory restore. See Section 6.5.
24
SOP1
Hi-Z
–
SOP[2:0] used for factory restore. See Section 6.5.
27
GND
N/A
–
Ground
28
GND
N/A
–
Ground
30
GND
N/A
–
Ground. Reference for RF signal
31
RF_BG
Hi-Z
I/O 2.4-GHz RF input/output
32
GND
N/A
–
Ground. Reference for RF signal
34
SOP0
Hi-Z
–
SOP[2:0] used for factory restore. See Section 6.5.
35
nRESET
Hi-Z
I
Power on reset. TI recommends connecting the pin to a GPIO from
the host.
36
VBAT_RESET
Hi-Z
–
TI recommends leaving this unconnected. If the nRESET pin is not
connected to the host, then pull this pin to VBAT.
37
VBAT1
Hi-Z
–
Power supply for the module, can be connected to battery (2.3 V to
3.6 V)
38
GND
N/A
–
Ground
40
VBAT2
Hi-Z
–
Power supply for the module, can be connected to battery (2.3 V to
3.6 V)
43
GND
N/A
–
Ground
44
UART1_nRTS
Hi-Z
O UART interface to host (request to send)
(1) Using a configuration file stored on flash, the vendor can optionally block any possibility of bringing up AP using the FORCE_AP pin.
10
Terminal Configuration and Functions
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