UPD1002 datasheet(16/46 Pages) MICROCHIP

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UPD1002

DS00001760B-page 16

 2014 Microchip Technology Inc.

Source

Voltage

Select 0

VSEL0_N

OD8

This active low signal is one in a series of output pins

(VSEL0_N, VSEL1_N, and VSEL2_N) used to select the

correct source voltage from the DC-to-DC solution. Each

VSELx_N pin is dedicated to one voltage, assigned in

order of increasing supported voltage.

For example, if 5, 12 and 20 V capabilities are supported,

the VSELx_N selections will be as follows:

VSEL0_N = 5 V

VSEL1_N = 12 V

VSEL2_N = 20 V

In another example, if only 5 and 20 V care supported,

the VSELx_N selections will be as follows:

VSEL0_N = 5 V

VSEL1_N = 20 V

VSEL2_N = RESERVED

The VSELx_N pins are also used to set the overvoltage

protection (OVP) voltage on the VMON pin. The OVP

fault will trigger when the measured voltage on VMON is

10% above the selected voltage setting.

For a mapping of the VSELx_N voltage assignments for

each CFG_SEL1/CFG_SEL0 configuration profile, refer

to Section 3.3, "Configuration Selection (CFG_SEL0/

CFG_SEL1)," on page 24.

Note:

This function is only available in specific

device configurations.

Source

Voltage

Select 1

VSEL1_N

OD8

This active low signal is one in a series of output pins

(VSEL0_N, VSEL1_N, and VSEL2_N) used to select the

correct source voltage from the DC-to-DC solution. Each

VSELx_N pin is dedicated to one voltage, assigned in

order of increasing supported voltage.

Refer to the VSEL0_N definition for additional informa-

tion.

Note:

This function is only available in specific

device configurations.

Source

Voltage

Select 2

VSEL2_N

OD8

This active low signal is one in a series of output pins

(VSEL0_N, VSEL1_N, and VSEL2_N) used to select the

correct source voltage from the DC-to-DC solution. Each

VSELx_N pin is dedicated to one voltage, assigned in

order of increasing supported voltage.

Refer to the VSEL0_N definition for additional informa-

tion.

Note:

This function is only available in specific

device configurations.

TABLE 2-2:

PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

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