USB84604 datasheet(8/61 Pages) MICROCHIP

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USB84604

DS60001295C-page 8

 2014-2016 Microchip Technology Inc.

3.0

PIN DESCRIPTIONS

This section provides a detailed description of each pin. The signals are arranged in functional groups according to their

associated interface.

The “_N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low voltage

level. For example, RESET_N indicates that the reset signal is active low. When “_N” is not present after the signal

name, the signal is asserted at the high voltage level.

The terms assertion and negation are used exclusively. This is done to avoid confusion when working with a mixture of

“active low” and “active high” signals. The term assert, or assertion, indicates that a signal is active, independent of

whether that level is represented by a high or low voltage. The term negate, or negation, indicates that a signal is inac-

tive.

Note:

The buffer type for each signal is indicated in the BUFFER TYPE column of Table 3-1. A description of the

buffer types is provided in Section 3.2.

Note:

Compatibility with the Microchip UCS8100x family of USB port power controllers requires the UCS8100x

be connected on Port 1 of the USB84604. Additionally, both PRTPWR1 and OCS1_N must be pulled high

at Power-On Reset (POR).

TABLE 3-1:

PIN DESCRIPTIONS

Num Pins

Name

Symbol

Buffer

Type

Description

USB/HSIC Interfaces

Upstream

USB D+

(Flex Port 0)

FLEX_USBUP_DP

AIO

Upstream USB Port 0 D+ data signal.

See Note 1.

Note:

The upstream Port 0 signals can be

optionally swapped with the down-

stream Port 1 signals.

Port 0 D+

Disable

Configuration

Strap

PRT_DIS_P0

This strap is used in conjunction with

PRT_DIS_M0 to disable USB Port 0.

0 = Port 0 D+ Enabled

1 = Port 0 D+ Disabled

Note:

Both PRT_DIS_P0 and PRT_DIS_M0

must be tied to VDD33 at reset to

place Port 0 into HSIC mode.

See Note 2 for more information on configuration

straps.

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