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MAX11300/MAX11301 PIXI Configuration Software User Guide

7.10

GPI Controlled Analog Switch

Two adjacent PIXI ports can form a 60

Ω analog switch that is controlled by two different

schemes. Figure 17 represents an analog switch that is dynamically controlled by any other

PIXI port configured as GPI. The switch component connects two adjacent ports, using a

third port as a control line for the switch. The DAC on the control line sets the level that will

trigger the opening or closing of the switch. The switch connections have to be adjacent ports

with connection not allowed between PORT0 and PORT19. The control line does not have

this restriction. The control line logic can also be flipped by just setting the inversion bit.

Figure 17. Externally Controlled Analog Switch

NAME

DESCRIPTION

DEFAULT

RANGE

Pin Info –

Control

Port# for the control line

input

None

PORT0 to PORT19

Pin Info –

Switch I/O 1

Port# for one side of

switch

None

PORT0 to PORT19

Pin Info –

Switch I/O 2

Port# for other side of

switch

None

PORT0 to PORT19

Transmission Mode–

Inverted

Flip the control logic

Non-Inverted

Non-Inverted / Inverted

Voltage –

Input Threshold

Threshold for the

comparator (VREF = 2.5V)

0 to 2.5V

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