FUSB302B01MPX datasheet(21/32 Pages) ONSEMI

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FUSB302B

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Table 20. MEASURE

(Address: 04h; ·Reset Value: 0x0011_0001; Type: Read/Write)

Bit #

Name

R/W/C

Size (Bits)

Description

Reserved

N/A

Do Not Use

MEAS_VBUS

R/W

MDAC/comparator measurement is controlled by MEAS_CC*

bits

Measure VBUS with the MDAC/comparator. This requires

MEAS_CC* bits to be 0

5:0

MDAC[5:0]

R/W

Measure Block DAC data input. LSB is equivalent to 42 mV of

voltage which is compared to the measured CC voltage.

The measured CC is selected by MEAS_CC2, or MEAS_CC1 bits.

MDAC[5:0]

MEAS_VBUS = 0

MEAS_VBUS = 1

Unit

00_0000

0.042

0.420

00_0001

0.084

0.840

11_0000

2.058

20.58

11_0011

2.184

21.84

11_1110

2.646

26.46

11_1111

> 2.688

26.88

Table 21. SLICE

(Address: 05h; Reset Value: 0x0110_0000; Type: Read/Write)

Bit #

Name

R/W/C

Size (Bits)

Description

7:6

SDAC_HYS[1:0]

R/W

Adds hysteresis where there are now two thresholds, the lower

threshold which is always the value programmed by SDAC[5:0]

and the higher threshold that is:

11: 255 mV hysteresis: higher threshold = (SDAC value + 20hex)

10: 170 mV hysteresis: higher threshold = (SDAC value + Ahex)

01: 85 mV hysteresis: higher threshold = (SDAC value + 5)

00: No hysteresis: higher threshold = SDAC value

5:0

SDAC[5:0]

R/W

BMC Slicer DAC data input. Allows for a programmable threshold

so as to meet the BMC receive mask under all noise conditions.

Table 22. CONTROL0

(Address: 06h; Reset Value: 0x0010_0100; Type: (see column below))

Bit #

Name

R/W/C

Size (Bits)

Description

Reserved

N/A

Do Not Use

TX_FLUSH

W/C

Self clearing bit to flush the content of the transmit FIFO

INT_MASK

R/W

Mask all interrupts

Interrupts to host are enabled

Reserved

N/A

Do Not Use

3:2

HOST_CUR[1:0]

R/W

Controls the host pull up current enabled by PU_EN[2:1]:

00: No current

01: 80

mA – Default USB power

10: 180

mA – Medium Current Mode: 1.5 A

11: 330

mA – High Current Mode: 3 A

AUTO_PRE

R/W

Starts the transmitter automatically when a message with

a good CRC is received. This allows the software to take as

much as 300

mS to respond after the I_CRC_CHK interrupt is

received. Before starting the transmitter, an internal timer

waits for approximately 170

mS before executing the transmit

start and preamble

Feature disabled

TX_START

W/C

Start transmitter using the data in the transmit FIFO. Preamble

is started first. During the preamble period the transmit data

can start to be written to the transmit FIFO. Self clearing.

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