CYUSB3314 datasheet(29/43 Pages) CYPRESS

29 / 43 page

CYUSB330x/CYUSB331x

CYUSB332x/CYUSB230x

Document Number: 001-73643 Rev. *R

Page 29 of 43

7:6 HS_AMPLITUDE_DS4

b’00

HS driver amplitude control; HS driver current: +0% to +7.5%

b’00: Default

b’01: +2.5%

b’10: +5%

b’11: +7.5%

5:4 HS_AMPLITUDE_DS3

b’00

3:2 HS_AMPLITUDE_DS2

b’00

1:0 HS_AMPLITUDE_DS2

b’00

7:6 HS_AMPLITUDE_US

b’00

5:2 HS_SLOPE

b'0100 HS driver slope control for all ports

b’0000: +15%

b’0001: +5%

b’0100: Default

b’0101: -5%

b’1111: -7.5%

1:0 HS_TX_VREF

b’10

Reference voltage for HS squelch (transmission envelope

detector) for all ports

b’00: 96 mV

b’01: 108 mV

b’10: 120 mV

b’11: 132 mV

7:3 HS_PREEMP_EN[4:0]

b’00000 HS driver pre-emphasis enable – for ports DS4, DS3, DS2, DS1,

and US

0: pre-emphasis is disabled

1: pre-emphasis is enabled

HS_PREEMP_DEPTH_DS4[17]

HS driver pre-emphasis depth

0: +10%

1: +20%

HS_PREEMP_DEPTH_DS3[17]

HS_PREEMP_DEPTH_DS2[17]

HS_PREEMP_DEPTH_DS1[17]

HS_PREEMP_DEPTH_US[17]

Reserved

4:1 PCS_TX_DEEMPH_DS4

0x6

USB 3.0 Tx driver de-emphasis value

0x3: -2.75 dB

0x6: -3.4 dB (Default)

0x9: -4.0 dB

Reserved

7:4 PCS_TX_DEEMPH_DS3

0x6

USB 3.0 Tx driver de-emphasis value

0x3: -2.75 dB

0x6: -3.4 dB (Default)

0x9: -4.0 dB

3:0 PCS_TX_DEEMPH_DS2

0x6

7:4 PCS_TX_DEEMPH_DS1

0x6

3:0 PCS_TX_DEEMPH_US

0x6

Reserved

5:0 PCS_TX_SWING_FULL_DS4

0x29

Adjust launch amplitude of the transmitter

0x1F – 0.9 V

0x29 – 1.0 V (Default)

0x35 – 1.1 V

0x3F – 1.2 V

7:6 Reserved

Reserved

5:0 PCS_TX_SWING_FULL_DS3

0x29

Adjust launch amplitude of the transmitter

0x1F – 0.9 V

0x29 – 1.0 V (Default)

0x35 – 1.1 V

0x3F – 1.2 V

Table 7. EEPROM Map (continued)

I2C Offset Bits

Name

Default

Description

Note

17. HS_PREEMP_DEPTH is valid only when corresponding HS_PREEMP_EN is set for that port.

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