參數(shù)資料
型號: ISP1160BD/01,118
廠商: ST-ERICSSON
元件分類: 總線控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封裝: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件頁數(shù): 28/88頁
文件大?。?/td> 394K
代理商: ISP1160BD/01,118
Philips Semiconductors
ISP1160
Embedded USB Host Controller
Product data
Rev. 05 — 24 December 2004
34 of 88
9397 750 13963
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9.8.2
Using an external OC detection circuit
When VCC (pin 56) is connected to a 3.3 V instead of the 5 V power supply, the
internal OC detection circuit cannot be used. An external OC detection circuit must be
used instead. Regardless of the VCC value, an external OC detection circuit can
always be used. To use an external OC detection circuit, AnalogOCEnable, bit 10 of
the HcHardwareConguration register, should be logic 0. By default after reset, this
bit is already logic 0; therefore, the HCD does not need to clear this bit.
Figure 27 shows how to use an external OC detection circuit.
9.9 Suspend and wake-up
9.9.1
HC suspended state
The HC can be put into suspended state by setting the HcControl register (01H to
read, 81H to write). See Figure 14 for the HC’s ow of USB state changes.
’n’ represents the downstream port number (n=1or2).
Fig 27. Using an external OC detection circuit.
Vo
Vi
OC
EN
VCC
H_OCn_N
H_PSWn_N
H_DMn
H_DPn
USB
downstream
port
connector
47 pF
(2
×)
22
22
VBUS
+3.3 V or +5 V
+5 V
external
OC detect
004aaa067
ATX
1
0
Reg
PSW
OC select
OC detect
regulator
HC CORE
C/L
SIE
15 k
(2
×)
ISP1160
bit 10
bit 12
HcHardware
Configuration
HcHardware
Configuration
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