TUSB2E221 datasheet(44/65 Pages) TI

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Hardware default value can be overridden through factory programmable OTP for this register.

Table 9-19. U_DISCONNECT_SQUELCH_PORT1 Register Field Descriptions

Bit

Field

Type

Reset

Default

from OTP

(Y/N)

Description

7-4

U_DISCONNECT_THR

ESHOLD_P1

RH/W

VHSDSC adjustment

USB Minimum HS HOST Disconnect Threshold

(0% to +57% in ~3.7% steps)

Default through OTP

0h = 525mV (minimum), 0% (hw default)

1h = 545mV (minimum), +4%

2h = 565mV (minimum), +8%

3h = 585mV (minimum), +11%

4h = 605mV (minimum), +15%

5h = 625mV (minimum), +19%

6h = 645mV (minimum), +23%

7h = 665mV (minimum), +27%

8h = 685mV (minimum), +31%

9h = 705mV (minimum), +34%

Ah = 725mV (minimum), +38%

Bh = 745mV (minimum), +42%

Ch = 765mV (minimum), +46%

Dh = 785mV (minimum), +50%

Eh = 805mV (minimum), +53%

Fh = 825mV (minimum), +57%

RESERVED

RH/W

Reserved

2-0

U_SQUELCH_THRESH

OLD_P1

RH/W

VHSSQ Adjustment

USB Squelch Detection Min Threshold (+30% to -15% in

~6.5% steps)

Default through OTP

0h = 130mV (minimum), +30%

1h = 124mV (minimum), +24%

2h = 117mV (minimum), +17%

3h = 111mV (minimum), +11%

4h = 104mV (minimum), +4% (hw default)

5h = 98mV (minimum), -2%

6h = 91mV (minimum), -9%

7h = 85mV (minimum), -15%

9.1.18 E_HS_TX_PRE_EMPHASIS_P1 Register (Offset = 77h) [Reset = 40h]

E_HS_TX_PRE_EMPHASIS_P1 is shown in Table 9-20.

Return to the Summary Table.

Hardware default value can be overridden through factory programmable OTP for this register.

Table 9-20. E_HS_TX_PRE_EMPHASIS_P1 Register Field Descriptions

Bit

Field

Type

Reset

Default

from OTP

(Y/N)

Description

7-5

E_HS_TX_PRE_EMPH

ASIS_P1

RH/W

E_TXPE adjustment

eUSB2 HS TX Pre-emphasis 0dB-3.86dB

Default through OTP

0h = 0dB (typical) (hw default)

1h = 0.67dB (typical)

2h = 1.29dB (typical)

3h = 1.87dB (typical)

4h = 2.41dB (typical)

5h = 2.92dB (typical)

6h = 3.41dB (typical)

7h = 3.86dB (typical)

TUSB2E221

SNLS757B – JUNE 2024 – REVISED NOVEMBER 2024

www.ti.com

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