参数资料
型号: ISP1160BD/01,118
厂商: ST-ERICSSON
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封装: 10 X 10 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-314-2, LQFP-64
文件页数: 26/88页
文件大小: 394K
代理商: ISP1160BD/01,118
Philips Semiconductors
ISP1160
Embedded USB Host Controller
Product data
Rev. 05 — 24 December 2004
32 of 88
9397 750 13963
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
9.8 Overcurrent detection and power switching control
A downstream port provides 5 V power supply to VBUS. The ISP1160 has built-in
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 shows the ISP1160 downstream port power management scheme.
Using either internal or external 15 k
resistors.
Fig 24. Use of 15 k
pull-down resistors on downstream ports.
004aaa064
22
22
bit 12
HcHardware
Configuration
ISP1160
USB
connector
D
D
+
VBUS
internal
15 k
(2
×)
external
15 k
(2
×)
47 pF
(2
×)
’n’ represents the downstream port numbers (n = 1 or 2).
Fig 25. Downstream port power management scheme.
004aaa065
1
0
Reg
bit 10
PSW
OC select
OC detect
regulator
H_OCn_N
H_PSWn_N
HC CORE
C/L
ISP1160
VCC
(
+5 V or +3.3 V)
HcHardware
Configuration
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