ISP1362BDTM STEricsson, ISP1362BDTM Datasheet - Page 47

• Manufacturer Part Number: ISP1362BDTM
• Manufacturer: STEricsson

Specifications of ISP1362BDTM

• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Package Type: LQFP
• Rad Hardened: No
• Lead Free Status / RoHS Status: Compliant

ISP1362_7
Product data sheet
11.8.2 Using external overcurrent detection circuit
11.8.3 Overcurrent detection circuit using internal charge pump in OTG mode
When V
supply, the internal overcurrent detection circuit cannot be used. An external overcurrent
detection circuit must be used instead. Nevertheless, regardless of the V
an external overcurrent detection circuit can be used from time to time. To use an external
overcurrent detection circuit, set AnalogOCEnable, bit 10 of register
HcHardwareConfiguration, to logic 0. By default, this bit is set to logic 0 after reset.
Therefore, the HCD does not need to clear this bit.
Figure 24
When port 1 is operating in OTG mode, you may choose to use the internal charge pump
to provide 5 V V
condition is detected by a drop in V
overcurrent condition causes a change in the A_VBUS_VLD bit of the OtgStatus register.
The software must clear the DRV_VBUS bit in the OtgControl register when it detects the
A_VBUS_VLD bit turning to logic 0.
Fig 24. Using external overcurrent detection circuit
DD(REF5V)
(1) 100 μF for the host port, or 4.7 μF for the OTG port.
shows how to use an external overcurrent detection circuit.
chassis
chassis
V
GND
BUS
DM
DP
BUS
1
2
3
4
5
6
(pin 56) is connected to the 3.3 V power supply instead of the 5 V power
, or supply V
Rev. 07 — 29 September 2009
DGND
DGND
C41 (1)
BUS
BUS
from an external source. In this mode, the overcurrent
DGND
that will be sensed by the built-in comparator. The
C17
0.1 μF
PSU_5V
FB2
Single-chip USB OTG controller
V
V
OC detection
IN
OUT
OC
EN
© ST-ERICSSON 2009. All rights reserved.
ISP1362
CC
connection,
004aaa149
H_PSWn
H_OCn
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