UCS1002-3 datasheet(60/114 Pages) MICROCHIP

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UCS1002-3

DS20006852A-page 60

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10.4.5

HIGH-SPEED SWITCH

CONFIGURATION REGISTER

The contents of this register are retained in Sleep.

bit 3-2

DISCHG_TIME_SEL[1:0]: Sets the tDISCHARGE time as follows:

00 = 100 ms

01 = 200 ms (default)

10 = 300 ms

11 = 400 ms

bit 1-0

ATT_TH[1:0]: Determines the Attach Detection threshold (IDET_QUAL) and Removal Detection thresholds

(IREM_QUAL_DET and IREM_QUAL_ACT) as shown below. (Note 1)

00 = 200 µA Attach, 100 µA Removal Threshold

01 = 400 µA Attach, 300 µA Removal Threshold

10 = 800 µA Attach, 700 µA Removal Threshold

11 = 1000 µA Attach, 900 µA Removal Threshold (default)

Note 1: The removal threshold is different when operating in the Active power state versus when operating in the

Detect power state.

(CONTINUED)

U-x

R/W-1

R/W-0

R/W-1

R/W-0

—

RESERVED

HSW_CUST

HSW_CDP

HSW_DET HSW_DCE

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-5

Unimplemented

bit 4

RESERVED: Do not change. This bit will default to ‘1’. Changing this bit will have no effect.

bit 3

HSW_CUST: Enables the USB high-speed data switch to be active during the Custom handshake. This

control is checked at the beginning o

f charger emulation. Therefore, changing this control during emulation has no immediate effect. Upon

restarting charger emulation (as a result of the EM_RETRY bit being set, a Removal Detection event, or

change of emulation controls), the high-speed switch is closed.

1 = The USB high-speed data switch is enabled while the Custom charger emulation profile is applied.

Also, if the Custom charger emulation profile is accepted during the Dedicated Charger Emulation

Cycle, the high-speed switch stays closed.

0 = The USB high-speed data switch is disabled while the Custom charger emulation profile is applied.

bit 2

HSW_CDP: Enables the USB high-speed data switch to be active during the CDP handshake. This

control is checked at the beginning of charger emulation. Therefore, changing this control during

emulation has no immediate effect. Upon restarting charger emulation (as a result of a Removal

Detection event or change of emulation controls), the high-speed switch is closed.

1 = The USB high-speed data switch is enabled during the CDP handshake.

0 = The USB high-speed data switch is disabled during the CDP handshake.

bit 1

HSW_DET: Enables the USB high-speed data switch to be active during the Detect power state. If the

S0 control is set to ‘0’, this bit is ignored.

1 = The USB high-speed data switch is closed during the Detect power state.

0 = The USB high-speed data switch is open during the Detect power state.

UCS1002-3 Datasheet(PDF) 60 Page - Microchip Technology

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