UPD360 datasheet(82/221 Pages) MICROCHIP

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UPD360

DS00002084C-page 82

 2016-2017 Microchip Technology Inc.

9.9

Back-Drive Detection

Back-drive detection is implemented on both CC pins, which prevents backwards current flow. The back-drive protection

circuit is always operational and triggers when VCCx > VS.

Detection of the back-drive condition causes the CC1 Back-Drive Error or CC2 Back-Drive Error bits in the Power Inter-

rupt Status Register (PWR_INT_STS) to assert.

Hardware supports automatically disabling a VCONN FET on a CC pin in which back-drive was detected after the

debounce period specified in the VCONN OCS and Back-Drive Debounce Register (VCONN_DEB). This function is

enabled by setting CC Back-Drive Enable in VBUS Control Register (VBUS_CTL).

9.10

Standalone DFP (UPD360-A/UPD360-B Only)

9.10.1

OVERVIEW

The device supports standalone DFP operation in which no CPU is available to configure the device. A key application

for this mode is a USB Type-C DFP companion for the Microchip USB58xx/USB59xx family of USB Hubs.

9.10.2

CONFIGURATION

This mode is entered by the appropriate setting of the CFG_SEL0 and CFG_SEL1 pins. The current charge advertised

and supplied is defined by the PWR_CAP0 and PWR_CAP1 pins. The device auto configures itself after a system level

reset event.

APPLICATION NOTE: The Standalone Operation field in CC Hardware Control Register (CC_HW_CTL) may be

used to disable standalone operation.

TABLE 9-8:

CONFIGURATION SELECT 1 (CFG_SEL1) I2C ADDRESS SETTINGS

(UPD360-A/UPD360-B ONLY)

Resistor

(+/-1%)

Description

CFG_SEL1_MATCH

GND

I2C Slave Address = 1011_111

0000h

0.475 K

I2C Slave Address = 1011_110

0001h

0.953 K

I2C Slave Address = 1011_101

0003h

1.43 K

I2C Slave Address = 1011_100

0007h

1.87 K

I2C Slave Address = 1101_011

000Fh

2.37 K

I2C Slave Address = 1101_010

001Fh

2.87 K

I2C Slave Address = 1101_001

003Fh

3.32 K

I2C Slave Address = 1101_000

007Fh

3.83 K

I2C Slave Address = 1110_111

00FFh

4.22 K

I2C Slave Address = 1110_110

01FFh

4.75 K

I2C Slave Address = 1110_101

03FFh

5.23 K

I2C Slave Address = 1110_100

07FFh

5.62 K

I2C Slave Address = 1110_001

0FFFh

6.19 K

I2C Slave Address = 1110_011

1FFFh

6.65 K

I2C Slave Address = 1110_000

3FFFh

7.15 K

I2C Slave Address = 1110_010

7FFFh

>7.15 K

I2C Slave Address = 1001_000

FFFFh

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