ISP1161A1BM ST-Ericsson Inc, ISP1161A1BM Datasheet - Page 41

• Manufacturer Part Number: ISP1161A1BM
• Description: IC USB HOST/DEVICE CTRLR 64-LQFP
• Manufacturer: ST-Ericsson Inc

Specifications of ISP1161A1BM

• Controller Type: USB 2.0 Controller
• Interface: Parallel
• Voltage - Supply: 3.3V, 5V
• Current - Supply: 47mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-1163; ISP1161A1BM,557

Philips Semiconductors
9397 750 13961
Product data
Fig 35. Using internal OC detection circuit.
‘n’ represents the downstream port number (n = 1 or 2)
V OC = 5 V
V BUS
9.8.1 Using an internal OC detection circuit
V BUS
downstream
connector
5 V
USB
port
The internal OC detection circuit can be used only when V
a 5 V power supply. The HCD must set AnalogOCEnable, bit 10 of the
HcHardwareConfiguration register, to logic 1.
An application using the internal OC detection circuit and internal 15 k pull-down
resistors is shown in
AnalogOCEnable and DownstreamPort15KresistorSel to logic 1. They are bit 10 and
bit 12 of the HcHardwareConfiguration register, respectively.
When H_OCn detects an overcurrent status on a downstream port, H_PSWn will
output HIGH, a logic 1 to turn off the 5 V power supply to the downstream port V
When there is no such condition, H_PSWn will output LOW, a logic 0 to turn on the
5 V power supply to the downstream port V
In general applications, you can use a P-channel MOSFET as the power switch for
V
the drain, and H_PSWn to the gate. Call the voltage drop across the drain and source
the overcurrent detection voltage (V
a voltage comparator has been incorporated with a nominal voltage threshold ( V
of 75 mV. When V
off the P-channel MOSFET. If the P-channel MOSFET has a R
overcurrent threshold will be 500 mA. The selection of a P-channel MOSFET with a
different R
BUS
. Connect the 5 V power supply to the source of the P-channel MOSFET, V
MOSFET
P-Ch
47 pF
(2 )
DSon
22
22
will result in a different overcurrent threshold.
Rev. 03 — 23 December 2004
OC
H_PSWn
H_OCn
Figure
exceeds V
V CC
H_DMn
H_DPn
35. In this example, the HCD must set both
trip
OC detect
, H_PSWn will output a HIGH level, logic 1 to turn
regulator
OC
). For the internal overcurrent detection circuit,
15 k
USB single-chip host and device controller
(2 )
bit 12
BUS
Configuration
HcHardware
ATX
.
OC select
1
0 Reg
PSW
C/L
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
HC CORE
ISP1161A1
CC
SIE
Configuration
HcHardware
(pin 56) is connected to
ISP1161A1
DSon
bit 10
of 150 m , the
004aaa182
40 of 136
BUS
BUS
trip
to
.
)