SLG46721 datasheet(17/101 Pages) DIALOG

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SLG46721

7.0 I/O Pins

The SLG46721 has a total of 18 multi-function I/O pins which can function as either a user defined Input or Output, as well as

serving as a special function (such as outputting the voltage reference), or serving as a signal for programming of the on-chip

Non Volatile Memory (NVM).

Normal Mode pin definitions are as follows:

• Pin 1: VDD power supply

• Pin 2: general purpose input

• Pin 3: general purpose input or output with OE

• Pin 4: general purpose input or output

• Pin 5: general purpose input or output with OE

• Pin 6: general purpose input or output or analog comparator 0(+)

• Pin 7: general purpose input or output with OE or analog comparator 0(-)

• Pin 8: general purpose input or output

• Pin 9: general purpose input or output with OE

• Pin 10: general purpose input or output or analog comparator 1(+)

• Pin 11: ground

• Pin 12: general purpose input or output or analog comparator 1(-)

• Pin 13: general purpose input or output with OE or analog comparator 2(+)

• Pin 14: general purpose input or output with OE or analog comparator 2(-)

• Pin 15: general purpose input or output or analog comparator 3(+)

• Pin 16: general purpose input or output with OE

• Pin 17: general purpose input or output

• Pin 18: general purpose input or output with OE and Vref output (VREF2)

• Pin 19: general purpose input or output with OE and Vref output (VREF1)

• Pin 20: general purpose input or output or external clock input

Programming Mode pin definitions are as follows:

• Pin 1: VDD power supply

• Pin 2: VPP programming voltage

• Pin 11: ground

• Pin 16: programming mode control

• Pin 17: programming ID pin

• Pin 18: programming SDIO pin

• Pin 19: programming SRDWB pin

• Pin 20: programming SCL pin

Of the 18 user defined I/O pins on the SLG46721, all but one of the pins (Pin 2) can serve as both digital input and digital output.

Pin 2 can only serve as a digital input pin.

7.1 Input Modes

Each I/O pin can be configured as a digital input pin with/without buffered Schmitt Trigger, or can also be configured as a low

voltage digital input. Pins 6, 7, 10, 12, 13, 14, and 15 can also be configured to serve as analog inputs to the on-chip comparators.

Pins 18 and 19 can also be configured as analog reference voltage inputs.

7.2 Output Modes

Pins 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, and 20 can all be configured as digital output pins.

7.3 Pull Up/Down Resistors

All I/O pins have the option for user selectable resistors connected to the input structure. The selectable values on these resistors

are 10 k

, 100 k and 1 M. In the case of Pin 2, the resistors are fixed to a pull-down configuration. In the case of all other I/O

pins, the internal resistors can be configured as either pull-up or pull-downs.

SLG46721 Datasheet(PDF) 17 Page - Dialog Semiconductor

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