ISP1161ABM-T ST-Ericsson Inc, ISP1161ABM-T Datasheet - Page 41

• Manufacturer Part Number: ISP1161ABM-T
• Description: IC USB HOST CTRL FULL-SPD 64LQFP
• Manufacturer: ST-Ericsson Inc

Specifications of ISP1161ABM-T

• 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

Philips Semiconductors
9397 750 13962
Product data
Fig 35. Using internal OC detection circuit.
‘n’ represents the downstream port number (n = 1 or 2)
V BUS
∆V = + 5 V − V BUS
9.8.1 Using an internal OC detection circuit
downstream
+ 5 V
connector
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 kΩ 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, 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, logic 0 to turn on the 5 V
power supply to the downstream port V
In general applications, a P-channel MOSFET can be used 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
DSon
47 pF
(2×)
will result in a different overcurrent threshold.
22 Ω
22 Ω
Rev. 03 — 23 December 2004
OC
H_PSWn
H_OCn
Figure
exceeds V
V CC
H_DMn
H_DPn
Full-speed USB single-chip host and device controller
35. In this example, the HCD must set both
trip
OC detect
regulator
, H_PSWn will output a HIGH level, logic 1 to turn
OC
≥
15 kΩ
). For the internal overcurrent detection circuit,
(2×)
BUS
bit 12
.
Configuration
HcHardware
ATX
OC select
1
0 Reg
PSW
C/L
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
HC CORE
ISP1161A
SIE
CC
Configuration
HcHardware
(pin 56) is connected to
DSon
ISP1161A
bit 10
of 150 mΩ, the
004aaa090
40 of 134
BUS
BUS
trip
.
to
)