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: 66/88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
69 of 88
9397 750 13963
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
11. Power supply
The ISP1160 can operate at either 5 V or 3.3 V.
When using 5 V as the ISP1160’s power supply input, only VCC (pin 56) can be
connected to the 5 V power supply. An application with a 5 V power supply input is
shown in Figure 29. The ISP1160 has an internal DC/DC regulator to provide 3.3 V
for its internal core. This internal 3.3 V can also be obtained from VREG(3V3) (pin 58).
When using 3.3 V as the power supply input, the internal DC/DC regulator will be
bypassed. All four power supply pins (VCC, VREG(3V3), VHOLD1 and VHOLD2) can be
used as power supply input.
It is recommended that you connect all four power supply pins to the 3.3 V power
supply, as shown in Figure 30. If, however, you have board space (routing area)
constraints, you must connect at least VCC and VREG(3V3) to the 3.3 V power supply.
For both 3.3 V and 5 V operation, all four power supply pins should be connected to a
decoupling capacitor.
12. Crystal oscillator
The ISP1160 has a crystal oscillator designed for a 6 MHz parallel-resonant crystal
(fundamental). A typical circuit is shown in Figure 31. Alternatively, an external clock
signal of 6 MHz can be applied to input XTAL1, while leaving output XTAL2 open. See
Figure 32. The 6 MHz oscillator frequency is multiplied to 48 MHz by an internal PLL.
Fig 29. Using a 5 V supply.
Fig 30. Using a 3.3 V supply.
004aaa068
GND
VCC
VREG(3V3)
VHOLD1
VHOLD2
+5 V
ISP1160
004aaa069
GND
VCC
VREG(3V3)
VHOLD1
VHOLD2
+3.3 V
ISP1160
Fig 31. Oscillator circuit with external crystal.
Fig 32. Oscillator circuit using external oscillator.
18 pF
6 MHz
18 pF
004aaa070
XTAL2
XTAL1
ISP1160
OSC
Out
n.c.
6 MHz
004aaa071
XTAL2
XTAL1
ISP1160
VCC
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