ISP1161ABM-S ST-Ericsson Inc, ISP1161ABM-S Datasheet - Page 40

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

Specifications of ISP1161ABM-S

• 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
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 port 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 kΩ pull-down resistors on downstream ports.
Fig 34. Downstream port power management scheme.
Using either internal or external 15 kΩ resistors.
‘n’ represents the downstream port number (n = 1 or 2)
shows the ISP1161A 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 kΩ
ISP1161A
(2×)
bit 12
Full-speed USB single-chip host and device controller
OC detect
regulator
≥
004aaa088
D−
D+
22 Ω
22 Ω
ISP1161A
OC select
1
0 Reg
PSW
C/L
BUS
HC CORE
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
. The ISP1161A has built-in
Configuration
HcHardware
external
15 kΩ
(2×)
V BUS
bit 10
47 pF
ISP1161A
(2×)
004aaa089
connector
USB
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