Description of fields within Sub-Register 0x26:00 – GPIO_MODE
MSGP3
reg:26:00
bits:13,12
Mode Selection for GPIO3/TXLED. Allowed values are:
00: The pin operates as GPIO3– This is the default (reset) state.
01: The pin operates as the TXLED output.
10: Reserved. Do not select this value.
11: Reserved. Do not select this value.
When operating as the TXLED driver, the output is asserted briefly when the transmitter
completes sending a frame. The blink time is configurable via Sub-Register 0x36:28 –
PMSC_LEDC.
Note: Lighting LEDs will drain power in battery-powered applications.
MSGP4
reg:26:00
bits:15,14
Mode Selection for GPIO4/EXTPA. Allowed values are:
00: The pin operates as GPIO4– This is the default (reset) state.
01: The pin operates as the EXTPA output.
10: Reserved. Do not select this value.
11: Reserved. Do not select this value.
Refer to section 6.2 – External Power Amplification for further information on the use of
EXTPA.
MSGP5
reg:26:00
bits:17,16
Mode Selection for GPIO5/EXTTXE. Allowed values are:
00: The pin operates as GPIO5 – This is the default (reset) state.
01: The pin operates as the EXTTXE output.
10: Reserved. Do not select this value.
11: Reserved. Do not select this value.
Refer to section 6.2 – External Power Amplification for further information on the use of
EXTTXE.
MSGP6
reg:26:00
bits:19,18
Mode Selection forGPIO6/EXTRXE. Allowed values of MSGP6 are:
00: The pin operates as GPIO6– This is the default (reset) state.
01: The pin operates as the EXTRXE output.
10: Reserved. Do not select this value.
11: Reserved. Do not select this value.
Refer to section 6.2 – External Power Amplification for further information on the use of
EXTRXE.
MSGP7
reg:26:00
bits:21,20
Mode Selection for SYNC/GPIO7.Allowed values are:
00: The pin operates as the SYNC input– This is the default (reset) state.
01: The pin operates as GPIO7.
10: Reserved. Do not select this value.
11: Reserved. Do not select this value.
Please refer to section 6.1- External Synchronisation for information on the use of the SYNC
pin.
MSGP8
reg:26:00
bits:23,22
Mode Selection for IRQ/GPIO8. Allowed values are:
00: The pin operates as the IRQ output – This is the default (reset) state.
01: The pin operates as GPIO8.
10: Reserved. Do not select this value.
11: Reserved. Do not select this value.
7.2.39.2 Sub-Register 0x26:04 – Reserved
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