PAC1921 datasheet(24/56 Pages) MICROCHIP

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PAC1921 High-Side Current/Power Sensor Evaluation Board User’s Guide

DS50002376A-page 24

 2015 Microchip Technology Inc.

Jumper settings are described in Table 3-2.

3.6

TEST POINTS

The PAC1921 High-Side Current/Power Sensor Evaluation Board provides test points

for ground reference and signal access. Table 3-3 summarizes these test points.

TABLE 3-2:

JUMPER SETTINGS

Header

Label

Default Position

Alternate Position(s)

J1, J2

Vsource+, Vsource-

External power source terminals. (See Section 3.8.2 “Load Connection”.)

J3, J4

Demo Sys

Select Demo mode RSENSE+/-.

Positions 3-2 are jumpered on both

jumpers. (See Section 3.7 “Demo

Mode Setup and Operation”.)

Select Sys mode RSENSE+/-.

Positions 1-2 are jumpered on both

jumpers. (See Section 3.8 “Sys Mode

Setup and Operation”.)

J5, J6,

Reserved

Reserved for future use

J8 (ADDR_SEL)

(See

Section 3.3.1 “SMBus

Mode”)

In SMBus mode, sets SMBus address to

1001_100b at power-up.

Positions 1-2 are jumpered.

In SMBus mode, sets SMBus address to

1001_101b at power-up.

Positions 2-3 are jumpered.

J11

GND

Connect ground from external source for

Sys mode.

J13

GND, #READ/INT,

SMBus_DATA,

SMBus_CLK, VDD

USB bridge generates on-board 3.3V

and provides SMBus host.

Positions 1-2, 3-4, 5-6, 7-8, 9-10 are all

jumpered.

(See Section 3.2.1 “Direct SMBus

Connect Option”.)

TABLE 3-3:

TEST POINTS

Test Point

Marking

Signal Function Monitored

Vsense+ (orange)

SENSE+

Vsense- (yellow)

SENSE-

OUT (white)

OUT Pin

ADDR_SEL

SMBus Address Select

Vdd (red)

VDD

GND (black)

Ground

#READ/INT (yellow)

READ/INT Pin

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