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USB5744-I/2G データシート(PDF) 11 Page - Microchip Technology

部品番号 USB5744-I/2G
部品情報  4-Port SS/HS USB Controller Hub
PDF  49 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB5744-I/2G データシート(HTML) 11 Page - Microchip Technology

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 2015-2016 Microchip Technology Inc.
DS00001855D-page 11
USB5744
3.2
Pin Descriptions
This section contains descriptions of the various USB5744 pins. This pin descriptions have been broken into functional
groups as follows:
• USB 3.1 Gen 1 Pin Descriptions
• USB 2.0 Pin Descriptions
• USB Port Control Pin Descriptions
• SPI/SMBus Pin Descriptions
• Miscellaneous Pin Descriptions
• Power and Ground Pin Descriptions
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 when 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 the pin description tables. A
description of the buffer types is provided in Section 3.3, "Buffer Types," on page 15.
For additional information on configuration straps and configurable pins, refer to Section 3.4, "Configuration
Straps and Programmable Functions".
TABLE 3-3:
USB 3.1 GEN 1 PIN DESCRIPTIONS
Num
Pins
Symbol
Buffer
Type
Description
1
USB3UP_TXDP
IO-U
USB 3.1 Gen 1 upstream SuperSpeed transmit data plus.
1
USB3UP_TXDM
IO-U
USB 3.1 Gen 1 upstream SuperSpeed transmit data minus.
1
USB3UP_RXDP
IO-U
USB 3.1 Gen 1 upstream SuperSpeed receive data plus.
1
USB3UP_RXDM
IO-U
USB 3.1 Gen 1 upstream SuperSpeed receive data minus.
4
USBDN_TXDP[4:1]
IO-U
USB 3.1 Gen 1 downstream ports 4-1 SuperSpeed transmit data plus.
4
USBDN_TXDM[4:1]
IO-U
USB 3.1 Gen 1 downstream ports 4-1 SuperSpeed transmit data
minus.
4
USBDN_RXDP[4:1]
IO-U
USB 3.1 Gen 1 downstream ports 4-1 SuperSpeed receive data plus.
4
USBDN_RXDM[4:1]
IO-U
USB 3.1 Gen 1 downstream ports 4-1 SuperSpeed receive data
minus.
TABLE 3-4:
USB 2.0 PIN DESCRIPTIONS
Num
Pins
Symbol
Buffer
Type
Description
1
USB2UP_DP
IO-U
USB 2.0 upstream data plus (D+).
1
USB2UP_DM
IO-U
USB 2.0 upstream data minus (D-).



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