Copyright © 2019–2020, Texas Instruments Incorporated
Terminal Configuration and Functions
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12
SWRS225B – FEBRUARY 2019 – REVISED MARCH 2020
Table 4-1. Pin Description and Attributes (continued)
PIN
DEFAULT FUNCTION
DIGITAL I/O
STATE AT
RESET AND
HIBERNATE
I/O TYPE
CC3135 DEVICE PIN
NO.
DESCRIPTION
HOSTLESS
MODE
BLE COEX
CC_COEX_
OUT
CC_COEX_
IN
26
GND
N/A
N/A
N/A
–
Power
-
GND
27
GND
N/A
N/A
N/A
–
Power
-
GND
28
GND
N/A
N/A
N/A
–
Power
-
GND
29
GND
N/A
N/A
N/A
–
Power
-
GND
30
GND
N/A
N/A
N/A
–
Power
-
GND
31
RF_ABG
N/A
N/A
N/A
Hi-Z
RF
27, 28, 31
2.4 GHz & 5 GHz RF TX, RX
32
GND
N/A
N/A
N/A
–
Power
-
GND
33
NC
N/A
N/A
N/A
–
–
-
No Connect
34
SOP0
N/A
N/A
N/A
Hi-Z
–
35
A 100 k
Ω
pull down resistor is internally tied to this
SOP pin. SOP[2:0] used for factory restore. See
.
35
nRESET
N/A
N/A
N/A
Hi-Z
I
32
There is an internal 100 k
Ω
pull-up resistor option
from the nRESET pin to VBAT_RESET. Note:
VBAT_RESET is not connected to VBAT1 or
VBAT2 within the module. The following
connection schemes are recommended:
•
Connect nRESET to a GPIO from the host
only if nRESET will be in a defined state under
all operating conditions. Leave VBAT_RESET
unconnected to save power.
•
If nRESET cannot be in a defined state under
all operating conditions, connect
VBAT_RESET to the main module power
supply (VBAT1 and VBAT2). Due to the
internal pull-up resistor, a leakage current of
3.3 V / 100 k
Ω
is expected.
36
VBAT_RESET
N/A
N/A
N/A
Hi-Z
-
37
37
VBAT1
N/A
N/A
N/A
Hi-Z
-
39
Power supply for the module, must be connected
to battery (2.3 V to 3.6 V)
38
GND
N/A
N/A
N/A
–
Power
-
GND
39
NC
N/A
N/A
N/A
–
–
-
No Connect
40
VBAT2
N/A
N/A
N/A
Hi-Z
-
10, 44, 54
Power supply for the module, must be connected
to battery (2.3 V to 3.6 V)
41
NC
N/A
N/A
N/A
–
–
-
No Connect
42
DIO30
Y
Y
Y
Hi-Z
–
53
Network Scripter I/O
43
GND
N/A
N/A
N/A
–
Power
-
GND
44
UART1_nRTS
-
-
-
Hi-Z
O
50
UART interface to host (request to send)