ia3513 integration, ia3513 Datasheet - Page 24

• Manufacturer Part Number: ia3513
• Description: Headset Voice And Power Solution
• Manufacturer: integration

GENERAL PURPOSE I/Os
The five General Purpose Input Outputs (GPIOS) included in the IC enable high flexibility and the possibility to interact with
various external devices such as leds and push buttons.
Hardware modes
The GPIOS are programmable in 6 different hardware modes:
The availability of these modes for each GPIO is specified in the following table:
All GPIO inputs include 1ms to 5ms input debounce protections. When in Wake up mode, GPIO1 activates a 100ms to 500ms
debounce protection timer for this input.
Software modes
In addiction to the hardware modes, software programmable modes are also available. The GPIOS can be set to function in the
following software modes:
GPIO
• CMOS input, and output modes are standard modes operating based on the DC-DC output voltage.
• Low current open drain output, used to drive digital signals that can be referred to any voltage in the application by usage
• Open drain mode is intended for switching output devices that require sink current up to 10mA; leds are the targeted
• High current open drain mode is intended for switching output devices needing sink currents up to 25mA; vibration
• Wake up input is an enhanced CMOS input mode intended to read the state of the on/off button. This mode operates on
• Charge notification Led driver. GPIO3 can be configured to automatically turn on an external Led whenever the Charge
• Normal mode, a high value in the pin is mapped to a high value in the register and vice-versa. The same is valid for a low
• Complementary mode, a high value in the pin is mapped to a low value in the register and vice-versa. The same is valid
• Sticky mode, which is valid only for input configured GPIO pins. The corresponding GPIO status bit will only toggle to high
• Blink mode (valid only for output hardware mode in GPIOS 2, 3, 4, and 5), the GPIO will toggle continuously with on and
1
2
3
4
5
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of a pull up resistor.
devices in this application.
motors are the targeted devices in this application.
the battery voltage and can be active and will be functional when the DC-DC is off.
function is activated.
value.
for a low value.
once the input pin changes to high if in normal mode, or once the input pin changes to low if in complementary mode,
and remain sticky to high independently of further changes in the value of the input pin. In order to change the status
value back to low, a write must be made to the status register at the corresponding position. By writing ’1’ to a sticky
GPIO the old value is kept, by writing ‘0’ the sticky value is cleared. This mode is especially useful because it is possible
to identify the interruption origin only by reading the status bits.
off times set by register position. In this mode the GPIO state (high or low) written in the status register will be ignored.
-available
-default
CMOS
input
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output
CMOS
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Low Current
Open Drain
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Open
Drain
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Open Drain
Current
High
Blink
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Wake up
input
notification
Charge
LED
Interruption
Notification
IA3513
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