CC2520_17 Datasheet, PDF (116/134 Pages) Texas Instruments – 2.4 GHZ IEEE 802.15.4/ZIGBEE RF TRANSCEIVER

CC2520 DATASHEET
2.4 GHZ IEEE 802.15.4/ZIGBEE® RF TRANSCEIVER
SWRS068 – DECEMBER 2007
GPIOCTRL2, A 0x022, R 0x28, Control GPIO2
Bit
Bit mnemonic
no.
7
IN2
6:0
CTRL2
Reset
value
0
0x28
Mode
R/W
R/W
Description
Defines whether GPIO2 is an input or output.
0 - GPIO2 is output
1 - GPIO2 is input
GPIO2 configuration
For details, see GPIOCTRL0 register
GPIOCTRL3, A 0x023, R 0x29, Control GPIO3
Bit
Bit mnemonic
no.
7
IN3
6:0
CTRL3
Reset
value
0
0x29
Mode
R/W
R/W
Description
Defines whether GPIO3 is an input or output.
0 - GPIO3 is output
1 - GPIO3 is input
GPIO3 configuration.
For details, see GPIOCTRL0 register
GPIOCTRL4, A 0x024, R 0x2A, Control GPIO4
Bit Bit mnemonic
no.
7
IN4
6:0 CTRL4
Reset
value
0
0x2A
Mode
R/W
R/W
Description
Defines whether GPIO4 is an input or output.
0 - GPIO4 is output
1 - GPIO4 is input
GPIO4 configuration.
For details, see GPIOCTRL0 register
GPIOCTRL5, A 0x025, R 0x90, Control GPIO5
Bit Bit mnemonic
no.
7
IN5
6:0 CTRL5
Reset
value
1
0x10
Mode
R/W
R/W
Description
Defines whether GPIO5 is an input or output.
0 - GPIO5 is output
1 - GPIO5 is input
GPIO5 configuration
For details, see GPIOCTRL0 register
GPIOPOLARITY, A 0x026, R 0x3F, Polarity control for GPIO pins
Bit Bit mnemonic
no.
7:6 RESERVED
5:0 POLARITY
Reset
value
00
0x3F
Mode
R0
R/W
Description
Read as zero
Selects output polarity or input edge of GPIO pins.
0 - Negative polarity. Level indication is active low.
When input, falling edge is active.
1 - Positive polarity. Level indication is active high.
When input, rising edge is active.
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