USB82642 datasheet(55/64 Pages) MICROCHIP

55 / 64 page

 2012-2021 Microchip Technology Inc.

DS60001253F-page 55

USB82642

DS60001253B

cont.

Section 5.1, USB82642 Pin

Description

Rows in Table 5-1:

• SD_D[7:0]: Note added: ‘The pull up resis-

tance is a current source that is limited to

VDD.’ replaces ‘and have weak pull-up resis-

tors’.

• The bi-directional signal has a weak internal

pull-up resistor.

• SPI_SPD_SEL: Value 30 MHz indicated as

deprecated.

• Pin RESET_N: Buffer Type changed from IS to

I. Description improved including cross refer-

ence to note pointing to Note 3 in Section 8.2,

Operating Conditions.

Section 5.4, ROM BOOT

Sequence

Removed:

second paragraph:

• ‘If there is no SPI ROM detected,..for configu-

ration options details.’

third paragraph:

• ‘either 30 MHz or ‘

• ‘For 30 MHz operation, this pin must be pulled

to ground through a 100 kΩ resistor. ‘

• Figure 5-5

Chapter 6.0

Figure 6-1 removed.

Section 6.1, Pin Reset

States

Table 6-2:

• Function changed from GPIO to IO for the fol-

lowing pins: 9, 10, 13, 14, 29, 35, 36

• Function changed from GPIO to GPO for the

following pins: 37

Section 7.1, Hub

Changed:

• The hub provides 1 Transaction Translator

(TT) that is shared by both downstream ports

defined as a single-TT configuration.-> The

hub provides a single Transaction Translator

(TT) shared by both downstream ports.

Section 7.1.1, Hub Configu-

ration Options

Changed:

• The Microchip hub supports a large number of

features (some are mutually exclusive), and

must be configured in order to correctly func-

tion when attached to a USB host controller ->

The Microchip hub supports a large number of

configurable features (some are mutually

exclusive).

• settings stored on an external EEPROM or SPI

Flash device-> settings loaded from an exter-

nal EEPROM or SPI Flash device

Section 7.2, Card Reader

Added as sub-bullet for MultiMediaCard 4.2:

• includes support for eMMC devices

TABLE A-1:

CUSTOMER REVISION HISTORY (CONTINUED)

Revision Level & Date

Section/Figure/Entry

Correction

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