FUSB303B

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13

Bit #

Name

Size (Bits)

Bit#: Default

Description

7:0

DEVICE_TYPE[7:0]

8

7:0 03h

03h: FUSB303B

(Address: 03h, Reset Value: 0100_1nnnb (Reset value for bits nnn will be set by the state of the PORT/DEBUG_N pin either during

power up when EN_N is LOW or when Vdd is valid and EN_N goes HIGH to LOW) or when SW_RES is set HIGH. In dead battery mode,

nnn = 010 or configured as SNK) Type: Read/Write)

Bit #

Name

Size (Bits)

Bit#: Default

Description

7

Reserved

1

70b

Do Not Use

6

ORIENTDEB

1

61b

1: When a Debug Accessory is found, continue to orientation

detection if CC is on CC1 or CC2

(result is in Status.Orient[1:0])

5:4

TRY[1:0]

2

5:4 00b

00: Disable (normal DRP detection for DRPs)

01: Enable Try.SNK state machine detection for DRP only

10: Enable Try.SRC state machine detection for DRP only

11: Disable (cannot have Try.SNK and Try.SRC active

together)

3

AUDIOACC

1

31b

1: Enable Audio Accessory Support

(Debug Accessory support is always enabled)

2

DRP

1

2n

1: Configure device as a Dual Role Port

(see reset value text above)

1

SNK

1

1n

1: Configure device as a Sink (see reset value text above)

0

SRC

1

0n

1: Configure device as a Source (see reset value text above)

9. If DRP bit, SNK bit and SRC bit are all set to 1, then the priority of which Portrole the FUSB303B assumes is first priority is DRP, second

priority is SNK and last priority is SRC. See Manual register note below for priority between Manual register bits and Portrole register.

Table 15. CONTROL

Address: 04h, Reset Value: 0100_0011b, Type: Read/Write

Bit #

Name

Size (Bits)

Bit#: Default

Description

7:6

T_DRP[:0]

2

7:6 01b

Sets the total period of the DRP toggle cycle

(i.e. Unattached.SNK period + Unattached.SRC period):

00: 60 ms

01: 70 ms

10: 80 ms

11: 90 ms

5:4

DRPTOGGLE[1:0]

2

5:4 00b

Selects different timing for Dual Role Port Toggle between

Unattached.SNK State and Unattached.SRC State.

00: 60% in Unattached.SNK and 40% in Unattached.SRC

01: 50% in Unattached.SNK and 50% in Unattached.SRC

10: 40% in Unattached.SNK and 60% in Unattached.SRC

11: 30% in Unattached.SNK and 70% in Unattached.SRC

3

DCABLE_EN

1

30b

1: Enable Dangling Cable internal methods to achieve a

stable attach

2:1

HOST_CUR[1:0]

2

2:1 01b

Controls the pull−up current when device enabled as a

Source

00: Reserved. Do not use.

01: 80 mA – Default USB Power

10: 180 mA – Medium Current Mode: 1.5 A

11: 330 mA – High Current Mode: 3 A

0

INT_MASK

1

1b

1: Global interrupt mask to mask all interrupts