USB5532B datasheet(38/68 Pages) MICROCHIP

38 / 68 page

 2012 - 2015 Microchip Technology Inc.

DS00001679C-page 38

USB5532B

Execute the Configuration Register Access command.

Read back data starting at memory offset 04h, which is where the Data byte starts.

Although the device can send out 128 bytes of memory data, it isn’t necessary to read the entire set, the SMBus Master

can send a stop at any time.

5.6.2

LED0/PIO0 REGISTER 1

TABLE 5-17:

CONFIGURATION REGISTER ACCESS COMMAND

Byte

Value

Comment

5Ah

Address plus write bit.

99h

Command 9937h.

37h

Command 9937h.

00h

Command Completion.

TABLE 5-18:

EXAMPLE SMBUS READ COMMAND

Byte

Value

Comments

5Ah

Address plus Write bit.

00h

Memory Address 0004h.

04h

Memory Address 0004h.

59h

Address plus Read bit.

80h

Device sends 128 bytes of data.

56h

Charging Downstream Port Detected.

TABLE 5-19:

LED0/PIO0 REGISTER 1

LED0_CTL1

(0X0806)

LED0_PIO0 Control Register

Bit

Name

R/W

Description

XNOR

R/W

This bit toggles the polarity of the LED output. It can be used to invert the

polarity.

MODE

R/W

0 - Blink the LED.

1 - Breath the LED.

5:0

RATE

R/W

In Blink mode: This is the Blink Rate of LED in 50 ms increments. Duty

cycle of 50%. Rate range is 50 ms to 3.15 seconds.

In Breath mode: This is the time for an active breadth in 500 ms

increments.

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