UCS1002-1 Datasheet, PDF (84/116 Pages) SMSC Corporation – Programmable USB Port Power Controller with Charger Emulation

Programmable USB Port Power Controller with Charger Emulation
Datasheet
10.7 Auto-recovery Configuration Register
Table 10.14 Auto-recovery Configuration Register
ADDR R/W REGISTER
B7
1Ch R/W Auto-recovery
-
Configuration
B6
B5
B4
TCYCLE[2:0]
B3
B2
B1
B0
DEFAULT
TRST_SW[1:0] VTST_SW[1:0] 2Ah
The contents of this register are retained in Sleep.
The Auto-recovery Configuration register sets the parameters used when the Auto-recovery fault
handling algorithm is invoked (see Section 7.6.1, "Auto-recovery Fault Handling").
Once the Auto-recovery fault handling algorithm has checked the over-temperature and back-drive
conditions, it will set the ILIM value to I_TEST and then turn on the port power switch and start the t_RST
Timer. If, after the timer has expired, the VBUS voltage is less than V_TEST, then it is assumed that a
short circuit condition is present and the Error state is reset.
Bits 6 - 4 - TCYCLE[2:0] - Defines the delay (t_CYCLE) after the Error state is entered before the Auto-
recovery fault handling algorithm is started as shown in Table 10.15.
Table 10.15 t_CYCLE Options
TCYCLE [2:0]
2
1
0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
TCYCLE TIME
15 ms
20 ms
25 ms (default)
30 ms
35 ms
40 ms
45 ms
50 ms
Bits 3 - 2 - TRST_SW[1:0] - Sets the t_RST time as shown in Table 10.16.
Table 10.16 TRST_SW Options
TRST_SW[1:0]
1
0
0
0
T_RST
10 ms
Revision 1.4 (07-16-13)
84
DATASHEET
SMSC UCS1002