ISP1161A1BMUM STEricsson, ISP1161A1BMUM Datasheet - Page 40

• Manufacturer Part Number: ISP1161A1BMUM
• Manufacturer: STEricsson

Specifications of ISP1161A1BMUM

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
9397 750 13961
Product data
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
(‘n’ 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 resistors.
‘n’ represents the downstream port number (n = 1 or 2)
shows the ISP1161A1 downstream port power management scheme
Configuration
HcHardware
( 5 V or 3.3 V)
H_PSWn
H_OCn
Rev. 03 — 23 December 2004
V CC
internal
15 k
ISP1161A1
(2 )
bit 12
OC detect
regulator
004aaa180
D
D
USB single-chip host and device controller
22
22
ISP1161A1
OC select
1
0 Reg
PSW
C/L
BUS
HC CORE
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
. The ISP1161A1 has built-in
Configuration
HcHardware
external
15 k
(2 )
V BUS
bit 10
ISP1161A1
47 pF
(2 )
004aaa181
connector
USB
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