P9038 DATASHEET

P9038 August 1, 2016

13

©2016 Integrated Device Technology, Inc.

LED Functions

Depending upon the selected LED mode, one or two LEDs

indicate the various functional states of the system including

possible Fault conditions. Both single-LED and dual-LED

indications are fully compliant with WPC requirements. Table

7 shows the various indications of all of the supported LED

modes.

As shown in Figure 3 one or two resistors configure the

desired LED option combinations in accordance with the

values in Table 7. The DC voltage set in this way is measured

one time during power-on to determine the LED configuration.

To avoid inaccuracy of the resistor setting caused by the LED,

the useful DC voltage range for all options except the highest

value must be limited to not greater than 1Vdc.

Figure 3. P9038 LED Resistor Optioning

IDTP9038

To ADC

Ra

Rb

LDO2P5V_OUT

GPIO3

Resistor

to set

options

LED Mode Resistor Configuration

Standby

Transfer

Complete

Low-Power

Fault

LED1- Green

On

Blink 1Hz

On

Blink 2Hz

OFF

LED2- Red

On

Off

Off

Off

Blink 4Hz

LED1- Green

On

On

Off

Blink 2Hz

OFF

LED2- Red

On

Off

Off

Off

Blink 4Hz

LED1- Green

Off

Blink 1Hz

On

Blink 2Hz

Blink 4Hz

LED2- n/a

-

-

-

-

-

LED1- Green

Off

On

Off

Blink 2Hz

Blink 4Hz

LED2- n/a

-

-

-

-

-

LED1- Green

Off

On

Off

Blink 2Hz

Off

LED2- Red

Off

Off

Off

Off

Blink 4Hz

LED1- Green

Off

Off

On

Off

Off

LED2- Red

Off

On

Off

Blink 2Hz

Blink 4Hz

LED1- Green

LED2- Red

LED1- Green

LED2- Red

LED1- Green

LED2- Red

LED1- Green

Off

Blink 1Hz

On

Blink 2Hz

Off

LED2- Red

Off

Off

Off

Off

Blink 4Hz

Note 1 - Voltage div ider on GPIO3 should use 1% resistors w ith parallel impedance approx imately 20k-50k.

"Low Pow er" is indicated in USB pow ered applications w hen USB does not prov ide sufficient DC pow er

"Low Pow er" Blink is approx imately 80% on-time

Note 2 - LED Select v oltage should be w ithin ±3% of listed v alue.

9

Pull Up

>=1.500V

Pull Down

<=0.080V

10

1

0.370V

0.510V

0.660V

0.220V

Dual LED, Standby - Off

Red Indicate, No-Blink

Dual-LED, Standby - Off

Blink

Dual-LED, Standby - On

Blink

3

4

5

2

7

6

8

Single-LED, Standby OFF

Blink

Single-LED, Standby OFF

No Blink

Dual LED, Standby - Off

No-Blink

Reserved

Reserved

1.000V

0.810V

1.100V

1.250V

Reserved

LED Control

Option

LED Select

GPIO3 Voltage

Description

LED #/

Color

Operational Status

Dual LED, Standby - On

No-Blink