13892 datasheet(39/158 Pages) FREESCALE

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FUNCTIONAL DESCRIPTION

FUNCTIONAL PIN DESCRIPTION

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC13892

ADIN7

ADC generic input channel 7, group 1. ADIN7 may be used as a general purpose unscaled input or as a divide by 2 scaled

input. In a typical application, an ambient light sensor is connected here. A second general purpose input ADIN7B is available

on channel 7. This input is muxed on the GPO4 pin. In the application, a second ambient light sensor is supposed to be connected

here.

TSX1 AND TSX2, TSY1 AND TSY2 - Note: The TS[xy] [12] inputs must not exceed BP or VCORE.

Touch Screen Interfaces X1 and X2, Y1 and Y2. The touch screen X plate is connected to TSX1 and TSX2, while the Y plate

is connected to Y1 and Y2. In inactive mode, these pins can also be used as general purpose ADC inputs. They are respectively

mapped on ADC channels 4, 5, 6, and 7. In interrupt mode, a voltage is applied to the X-plate (TSX2) via a weak current source

to VCORE, while the Y-plate is connected to ground (TSY1).

TSREF

Touch Screen Reference regulator. This regulator is powered from VCORE. In applications not supporting touch screen, the

TSREF can be used as a low current general purpose regulator, or it can be kept disabled and the bypass capacitor omitted.

ADTRIG

ADC trigger input. A rising edge on this pin will start an ADC conversion.

GNDADC

Ground for A to D circuitry.

THERMAL GROUNDS

GNDSUB1-9

General grounds and thermal heat sinks.

13892 Datasheet(PDF) 39 Page - Freescale Semiconductor, Inc