Table 4-1. Pin Functions

PIN

TYPE(1)

INTERNAL

PULLUP/PULLDOWN

DESCRIPTION

NAME

NO.

EQ

6

I

N/A

USB High-speed EQ select via external pull down resistor.

Both edge boost and DC boost are controlled by a single pin.

Sampled upon power up. Does not recognize real time adjustments.

Auto selects EQ LEVEL = 3 when left floating.

RESERVED

11

I

500kΩ PU

Reserved pin for TI test purposes. Leave floating or connect external

capacitor to GND for normal operation.

ENA_HS

9

I/O

N/A

After reset: Output signal ENA_HS. Flag indicating that channel is in

High-speed mode. Asserted upon:

1. Detection of USB-IF High-speed test fixture from an unconnected

state followed by transmission of USB TEST_PACKET pattern.

2. Squelch detection following USB reset with a successful HS

handshake [HS handshake is declared to be successful after single

chirp J chirp K pair where each chirp is within 18μs – 128μs].

D2P

7

I/O

N/A

USB High-speed positive port.

D2M

8

I/O

N/A

USB High-speed negative port.

GND

10

P

N/A

Ground

D1M

1

I/O

N/A

USB High-speed negative port.

D1P

2

I/O

N/A

USB High-speed positive port.

RESERVED

3

I/O

500kΩ PU

1.8 MΩ PD

Reserved pin for TI test purposes. Leave floating for normal

operation.

VCC

12

P

N/A

Supply power

RSTN

5

I

500kΩ PU

1.8 MΩ PD

Device disable/enable.

Low – Device is at reset and in shutdown, and

High - Normal operation.

Recommend 0.1µF external capacitor to GND to allow for clean

power on reset if not driven. If the pin is driven, it must be held low

until the supply voltage for the device reaches within specifications.

CD

4

O

When RSTN asserted there is

a 500kΩ PD

After reset: Output CD. Flag indicating that a USB device is attached

(connection detected). Asserted from an unconnected state upon

detection of DP or DM pull-up resistor. De-asserted upon detection of

disconnect.

(1)

I = input, O = output, P = power

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TUSB211A-Q1

SLLSFX8 – FEBRUARY 2024

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