14
SWRS225B – FEBRUARY 2019 – REVISED MARCH 2020
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Terminal Configuration and Functions
Copyright © 2019–2020, Texas Instruments Incorporated
4.3
Signal Descriptions
Table 4-2. Signal Descriptions
FUNCTION
SIGNAL NAME
PIN
NO.
PIN
TYPE
SIGNAL
DIRECTION
DESCRIPTION
Antenna
selection
DIO10
3
I/O
O
Antenna selection control
DIO12
9
I/O
O
DIO13
10
I/O
O
DIO23
12
I/O
O
DIO24
18
I/O
O
DIO28
I/O
O
DIO29
22
I/O
O
DIO25
23
O
O
DIO30
I/O
O
DIO3
48
I/O
O
DIO4
49
I/O
O
DIO5
50
I/O
O
DIO8
53
I/O
O
DIO9
54
I/O
O
BLE/2.4 GHz
Radio
coexistence
DIO10
3
I/O
I/O
Coexistence inputs and outputs
DIO12
9
I/O
I/O
DIO13
10
I/O
I/O
DIO23
12
I/O
I/O
DIO24
18
I/O
I/O
DIO28
I/O
I/O
DIO29
22
I/O
I/O
DIO30
I/O
I/O
DIO3
48
I/O
I/O
DIO4
49
I/O
I/O
DIO5
50
I/O
I/O
DIO8
53
I/O
I/O
DIO9
54
I/O
I/O
Hostless Mode
DIO10
3
I/O
I/O
Hostless mode inputs and outputs
DIO12
9
I/O
I/O
DIO13
10
I/O
I/O
DIO23
12
I/O
I/O
DIO24
18
I/O
I/O
DIO28
I/O
I/O
DIO29
22
I/O
I/O
DIO25
23
O
O
DIO30
I/O
I/O
DIO3
48
I/O
I/O
DIO4
49
I/O
I/O
DIO5
50
I/O
I/O
DIO8
53
I/O
I/O
DIO9
54
I/O
I/O
HOST SPI
HOST_SPI_CLK
5
I/O
I
Host SPI clock input
HOST_SPI_MOSI
6
I/O
I
Data from Host
HOST_SPI_MISO
7
I/O
O
Data to Host
HOST_SPI_nCS
8
I/O
I
Device select (active low)