ISP1161A1BD,151 STEricsson, ISP1161A1BD,151 Datasheet - Page 40

• Manufacturer Part Number: ISP1161A1BD,151
• Manufacturer: STEricsson

Specifications of ISP1161A1BD,151

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ISP1161A1_4
Product data sheet
9.8 OC detection and power switching control
A downstream port provides 5 V power supply to V
hardware functions to monitor the downstream ports loading conditions and control their
power switching. These hardware functions are implemented by the internal power
switching control circuit and overcurrent detection circuit. H_PSW1 and H_PSW2 are
power switching control output pins (active LOW, open-drain) for downstream
ports 1 and 2, respectively. H_OC1 and H_OC2 are overcurrent detection input pins for
downstream ports 1 and 2, respectively.
Figure 34
represents the downstream port numbers, n = 1 or 2).
Fig 33. Use of 15 k pull-down resistors on downstream ports.
Fig 34. Downstream port power management scheme.
Using either internal or external 15 k
‘n’ represents the downstream port number (n = 1 or 2)
shows the ISP1161A1 downstream port power management scheme (‘n’
Configuration
HcHardware
( 5 V or 3.3 V)
H_PSWn
H_OCn
V CC
Rev. 04 — 29 January 2009
internal
15 k
ISP1161A1
(2 )
bit 12
OC detect
regulator
004aaa180
D
D
resistors.
USB single-chip host and device controller
22
22
ISP1161A1
OC select
1
0 Reg
PSW
C/L
BUS
HC CORE
. The ISP1161A1 has built-in
Configuration
HcHardware
external
15 k
(2 )
V BUS
bit 10
47 pF
ISP1161A1
(2 )
© ST-NXP Wireless 2009. All rights reserved.
004aaa181
connector
USB
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