ISP1160BD/01 STEricsson, ISP1160BD/01 Datasheet - Page 31

• Manufacturer Part Number: ISP1160BD/01
• Manufacturer: STEricsson

Specifications of ISP1160BD/01

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ISP1160-01_7
Product data sheet
9.8 Overcurrent 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_N and H_PSW2_N
are power switching control output pins (active LOW, open-drain) for downstream ports 1
and 2, respectively. H_OC1_N and H_OC2_N are overcurrent detection input pins for
downstream ports 1 and 2, respectively.
Figure 25
Fig 24. Use of 15 kΩ pull-down resistors on downstream ports.
Fig 25. Downstream port power management scheme.
Using either internal or external 15 kΩ resistors.
’n’ represents the downstream port numbers (n = 1 or 2).
shows the ISP1160/01 downstream port power management scheme.
Configuration
HcHardware
H_PSWn_N
(+5 V or +3.3 V)
H_OCn_N
V CC
Rev. 07 — 29 September 2009
internal
15 kΩ
ISP1160/01
(2×)
bit 12
OC detect
regulator
004aaa064
≥
D−
D+
22 Ω
22 Ω
ISP1160/01
OC select
1
0 Reg
PSW
C/L
BUS
HC CORE
. The ISP1160/01 has built-in
Embedded USB host controller
external
Configuration
15 kΩ
HcHardware
(2×)
V BUS
bit 10
47 pF
(2×)
ISP1160/01
004aaa065
© ST-ERICSSON 2009. All rights reserved.
connector
USB
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