參數(shù)資料
型號： ISP1181
廠商： NXP Semiconductors N.V.
英文描述： Full-speed Universal Serial Bus Interface Device(全速通用串行總線接口器件)
中文描述： 全速通用串行總線接口設(shè)備（全速通用串行總線接口器件）
文件頁數(shù)： 42/69頁
文件大?。?/td> 1655K
代理商： ISP1181
Philips Semiconductors
ISP1181
Full-speed USB interface
Objective specification
Rev. 01 — 13 March 2000
42 of 69
9397 750 06896
Philips Electronics N.V. 2000. All rights reserved.
In isochronous mode, an interrupt is issued upon each packet transaction. The
firmware must take care of timing synchronization with the host. This can be done via
the loss of Start-Of-Frame (NOSOF) interrupt, enabled via bit IENOSOF in the
Interrupt Enable Register. If a Start-Of-Frame is lost, NOSOF interrupts are
generated every 1 ms. This allows the firmware to keep data transfer synchronized
with the host. After 3 missed SOF events the ISP1181 will enter ‘suspend’ state.
An alternative way of handling isochronous data transfer is to enable both the SOF
and the NOSOF interrupts and disable the interrupt for each isochronous endpoint.
14. Power supply
The ISP1181 is powered from a single supply voltage, ranging from 4.0 to 5.5 V. An
integrated voltage regulator provides a 3.3 V supply voltage for the internal logic and
the USB transceiver. This voltage is available at pin V
reg(3.3)
for connecting an
external pull-up resistor on USB connection D
+
. See
Figure 11
.
The ISP1181 can also be operated from a 3.0 to 3.6 V supply, as shown in
Figure 12
.
In that case the internal voltage regulator is disabled and pin V
reg(3.3)
must be
connected to V
CC
.
15. Crystal oscillator and LazyClock
The ISP1181 has a crystal oscillator designed for a 6 MHz parallel-resonant crystal
(fundamental). A typical circuit is shown in
Figure 13
. Alternatively, an external clock
signal of 6 MHz can be applied to input XTAL1, while leaving output XTAL2 open.
The 6 MHz oscillator frequency is multiplied to 48 MHz by an internal PLL. This
frequency is used to generate a programmable clock output signal at pin CLKOUT,
ranging from 3 to 48 MHz.
Fig 11. ISP1181 with a 4.0 to 5.5 V supply.
Fig 12. ISP1181 with a 3.0 to 3.6 V supply.
handbook, halfpage
VCC(5.0)
VCC(3.3)
Vreg(3.3)
ISP1181
MGS773
4.0 to 5.5 V
n.c.
handbook, halfpage
3.0 to 3.6 V
MGS774
VCC(5.0)
VCC(3.3)
Vreg(3.3)
ISP1181
Fig 13. Typical oscillator circuit.
handbook, halfpage
CLKOUT
6 MHz
18 pF
18 pF
XTAL2
XTAL1
MGS777
ISP1181
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISP1181A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus peripheral controller
ISP1181ABS 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus peripheral controller
ISP1181ABS,518 功能描述:USB 接口集成電路 USB 1.1 ADV DEVICE RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1181ABS,551 功能描述:USB 接口集成電路 USB 1.1 ADVANCED DEVICE RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1181ABS,557 功能描述:USB 接口集成電路 DO NOT USE ORDER -S OR -T PART RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20
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