isp1161bm NXP Semiconductors, isp1161bm Datasheet - Page 41

• Manufacturer Part Number: isp1161bm
• Description: Isp1161 Full-speed Universal Serial Bus Single-chip Host And Device Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 09567
Product data
Fig 35. Using internal OC detection circuit.
V BUS
V = 5 V
V BUS
9.8.2 Using external overcurrent detection circuit
downstream
connector
5 V
USB
port
When pin V
supply, then the internal OC detection circuit cannot be used. An external OC
detection circuit must be used instead. Nevertheless, regardless of V
connections, an external OC detection circuit can be used from time to time. To use
an external OC detection circuit, AnalogOCEnable (bit 10 of the
HcHardwareConfiguration register) should be set to logic 0. By default after reset, this
bit is already set to logic 0; therefore, the HCD does not need to clear this bit.
Figure 36
MOSFET
47 pF
P-Ch
(2 )
shows how to use an external OC detection circuit.
CC
22
22
is connected to the 3.3 V power supply instead of the 5 V power
Rev. 02 — 13 December 2002
H_PSWn
H_OCn
V CC
H_DMn
H_DPn
Full-speed USB single-chip host and device controller
OC detect
regulator
15 k
(2 )
bit 12
Configuration
HcHardware
ATX
OC select
1
0 Reg
PSW
C/L
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
HC CORE
ISP1161
SIE
Configuration
HcHardware
bit 10
ISP1161
CC
MGT960
’s
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