FUSB307BVMPX datasheet(8/57 Pages) ONSEMI

8 / 57 page

FUSB307B

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VCONN Control

The FUSB307B integrates a CCx to VCONN switch with

programmable OCP capability via the VCONN_OCP

standard VCONN current limit is used (210.5 mA). If

PWRCTRL.VCONN_PWR is set to 1, the programmable

VCONN_OCP is used.

The VCONN switch can be enabled via the PWRCTRL

(for CC1/2 selection).

A VCONN valid voltage is monitored and reported on

PWRSTAT.VCONN_VAL. The valid voltage threshold is

fixed at 2.4 V.

Debug Accessory Support

The FUSB307B implements autonomous detection of

Source and Sink debug accessories. A debug accessory

detection is indicated via a standard output. The FUSB307B

powers on looking for a debug accessories without

processor intervention.

If debug accessory detection is not wanted, the processor can

write TCPC_CTRL.DEBUG_ACC_CTRL = 1b.

Type−C Manual Mode Detection

The CC pull up (Rp) or pull down (Rd) resistors and DRP

toggle are setup via the ROLECTRL register.If a TCPM

wishes

control

Rp/Rd

directly,

can

write

ROLECTRL.DRP = 0b and the desired ROLECTRL bits

[3:0] (CC1/CC2).

The FUSB307B can autonomously toggle the Rp/Rd by

setting ROLECTRL.DRP = 1b and the starting value of

Rp/Rd in ROLECTRL.bits [3:0]. DRP toggling starts by

writing to the COMMAND register

If ROLECTRL.DRP = 1b, the only allowed values for

CC1/CC2 in ROLECTRL bits [3:0] are Rp/Rp or Rd/Rd.

When ROLECTRL bits 3:0 are set to Open and

ROLECTRL.DRP = 0b, the PHY and CC comparators are

powered down.

The FUSB307B updates the CCSTAT register on a

Connect, Disconnect, a change in ROLECTRL.DRP or a

change (tTCPCFilter debounced) on the CC1 or CC2 wire.

The TCPM reads CCSTAT upon detecting an interrupt

and seeing the ALERTL.I_CCSTAT = 1. The FUSB307B

indicates the DRP status, the DRP result, and the current CC

status in this register.

The FUSB307B will set CCSTAT.LOOK4CON = 0b

when it has stopped toggling as a DRP.

The TCPM reads the CCSTAT.LOOK4CON to determine

if the FUSB307B is toggling Rp/Rd when operating as a

DRP, it then reads CCSTAT.CON_RES to determine if the

FUSB307B is presenting an Rp or Rd and read the

CCSTAT.CC1_STAT

and

CCSTAT.CC2_STAT

determine the CC1 and CC2 states.

The FUSB307B debounces the CC lines for tTCPCfilter

before reporting the status on CCSTAT. The TCPM must

complete the debounce as defined in Type−C Specification.

FUSB307BVMPX Datasheet(PDF) 8 Page - ON Semiconductor

FUSB307BVMPX Datasheet(HTML) 8 Page - ON Semiconductor

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