FUSB302T datasheet(23/36 Pages) ONSEMI

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Table 9.

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 10. 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

1: Self clearing bit to flush the content of the transmit FIFO.

INT_MASK

R/W

1: Mask all interrupts.

0: Interrupts to host are enabled.

Reserved

N/A

Do Not Use

3:2

HOST_CUR[1:0]

R/W

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

00: No current

01: 80 µA

– Default USB power.

10: 180 µA

– Medium Current Mode: 1.5 A

11: 330 µA

– High Current Mode: 3 A

AUTO_PRE

R/W

1: Starts the transmitter automatically when a message with a good

CRC is received. This allows the software to take as much as

300 µS to respond after the I_CRC_CHK interrupt is received.

Before starting the transmitter, an internal timer waits for

approximately 170 µS before executing the transmit start and

preamble.

0: Feature disabled.

TX_START

W/C

1: 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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