900844 datasheet(89/118 Pages) FREESCALE

Part #	900844

Description	Integrated Power Management IC for Ultra-mobile and Embedded Applications

PDF	118 Pages

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Manufacturer	FREESCALE [Freescale Semiconductor, Inc]

Direct Link	http://www.freescale.com

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Analog Integrated Circuit Device Data

Freescale Semiconductor

900844

FUNCTIONAL DEVICE OPERATION

ADC SUBSYSTEM

The ADC will be used for sensing the current through select voltage regulators, touch screen support, PMIC thermal sensor,

battery voltage, current, and temperature.

Figure 49 is a representation of the ADC block.

Figure 49. ADC Block Representation

INPUT SELECTOR

The ADC has 22 input channels selected through the ADSEL[4:0] bits in the ADCADDRx register. Table 57 gives an overview

of the characteristics of each of these channels.

Table 57. ADC Inputs

Channel

SELECT[4:0]

ADC Input Signal

Input Level

Scaling

Scaled Version

00000

PMIC Die Temperature

1.2 – 2.4 V

00001

VCC Current Sense

0 – 2.4 V

00010

VNN Current Sense

0 – 2.4 V

00011

VCC180 Current Sense

0 – 2.4 V

00100

Reserved

00101

Reserved

00110

Input voltage (VBAT)

0 – 4.8 V

0 – 2.4 V

00111

Reserved

900844 Datasheet(PDF) 89 Page - Freescale Semiconductor, Inc

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