UPD360 datasheet(71/221 Pages) MICROCHIP

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 2016-2017 Microchip Technology Inc.

DS00002084C-page 71

UPD360

9.2.1

RP CURRENT SOURCES

In order to advertise the current charging capabilities of the device via the integrated port power controller or external

power circuit, Rp current sources are used. The current source can be selected by software using CC1 RP Value and

CC2 RP Value in the CC Control Register (CC_CTL). Table 9-5 summarizes the values supported by the current

sources in regards to the programmed value.

The current source coupled with the CC pins for RP advertisement is also used for sampling the CFG_SEL0 and CFG_-

SEL1 pins. When either of the CFG_SEL0/CFG_SEL1 pins are sampled, current is steered away from the CC pins and

no RP value is advertised. See the VBUS Comparator Control field in VBUS Control Register (VBUS_CTL) for further

details.

Powered Cable, UFP attached

Monitor CC2 for UFP detach.

CC1 is not monitored for detach.

Powered Cable, UFP attached

Monitor CC1 for UFP detach.

CC2 is not monitored for detach.

Debug accessory mode attached

Monitor both CC pins for detach

Off

Audio accessory mode attached.

Monitor both CC pins for detach

Off

TABLE 9-5:

RP CURRENT SOURCES

DFP Advertisement

Current source

(1.7V to 5.5V)

RPx Value

Disabled

00b

Default USB Power

80 uA +/-20%

01b

1.5A @ 5V

180 uA +/-8%

10b

3.0A @ 5V

330 uA +/-8%

11b

TABLE 9-4:

SOURCE DETECTION (CONTINUED)

CC1

CC2

Connection State

CC Comparator State

VBUS

VCONN

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