Pin Configuration - Texas Instruments SimpleLink CC2620 Technical Reference Manual

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Output enable (OE)

11.10.2 Pin Configuration

The IOC lets software configure the pins based on the application requirements. The software can

configure different characteristic settings for any or all of the I/O pins. All of the following features, except

for output driver (output enable set in the GPIO:DOE31_0 register), are controlled in the IOC:IOCFGn

Drive Strength (IOC:IOCFGn.IOSTR)

Configures the drive strength and maximum current of an I/O pin. All I/O pins support 2 mA and 4 mA,

while five pins support up to 8 mA. By setting IOC:IOCFGn.IOSTR to 0x0, the drive strength is

automatically updated based upon inputs from the battery monitor, BATMON, to maintain the set drive

strength level at different battery voltages.

Pull (IOC:IOCFGn.PULL_CTL)

Configures a weak pull on an I/O pin. The following can be set: pullup, pulldown, or no pull. See the

data sheet for specific pullup and pulldown resistance.

Slew Control (IOC:IOCFGn.SLEW_RED)

Sets high or low slew rate on an I/O pin.

Hysteresis (IOC:IOCFGn.HYST_EN)

Enables or disables input hysteresis on an I/O pin.

Open-Source or Open-Drain Configuration (IOC:IOCFGn.IOMODE)

Configures the pin as normal, open source, or open drain; all of these can be set to either inverted or

normal (noninverted).

Interrupt and Edge Detection (IOC:IOCFGn.EDGE_IRQ_EN and IOC:IOCFGn.EDGE_DET)

Enables interrupt triggered by edge detection on I/O pin. Different edge detection modes are

supported, and the possible modes are rising edge, falling edge, trigger on both rising and falling, or no

edge detection.

Input Driver (IOC:IOCFGn.IE)

Enables or disables the I/O input driver.

Output Driver (Depends on specific peripheral mapped to pin)

Enables or disables the I/O output driver.

SWCU117C – February 2015 – Revised September 2015

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Figure 11-2. Generic I/O pin (Simplified)

Pullup enable

Pulldown enable

Input enable (IE)

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