UCS2112 datasheet(49/64 Pages) MICROCHIP

49 / 64 page

 2015 Microchip Technology Inc.

DS20005424B-page 49

UCS2112

9.5

Auto-Recovery Register

The contents of this register are retained in Sleep.

The Auto-Recovery Configuration register sets the

parameters used when the Auto-recovery fault han-

dling algorithm is invoked. Once the Auto-recovery fault

handling algorithm has checked the overtemperature

and back-drive conditions, it will set the ILIM value to

ITEST and then turn on the port power switch and start

the tTST timer. If, after the timer has expired, the VBUS

voltage is less than VTEST, then it is assumed that a

short-circuit condition is present and the Error state is

restarted for Auto Recovery.

AUTO RECOVERY CONFIGURATION REGISTER (ADDRESS 15H)

R/W-0

R/W-1

R/W-0

R/W-1

R/W-0

R/W-1

R/W-0

LATCHS

TCYCLE<2:0>

TTST<1:0>

VTST_SW<1:0>

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

LATCHS:

Latch Set - Controls the fault-handling routine that is used in the case that an error is detected.

= Error state will be latched. In order for the UCS2112 to return to normal Active state, the ERR bit

must be cleared by the user.

= The UCS2112 will automatically retry when an error condition is detected.

bit 6-4

TCYCLE<2:0>:

Defines the delay (tCYCLE) after the Error state is entered before the Auto-recovery fault

handling algorithm is started as shown below.

000

= 15 ms

001

= 20 ms

010

= 25 ms

011

= 30 ms

100

= 35 ms

101

= 40 ms

110

= 45 ms

111

= 50 ms

bit 3-2

TTST<1:0>:

Retry Duration timer - Sets the tTST as shown below.

= 10 ms

= 15 ms

= 20 ms

= 25 ms

bit 1-0

VTST_SW:

Short-circuit Voltage Threshold VTEST voltage threshold that must be crossed during retries

to declare the short removed.

= 250 mV

= 500 mV

= 750 mV

= 1000 mV

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