參數(shù)資料
型號(hào): 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(yè)數(shù): 44/69頁(yè)
文件大小: 1655K
代理商: ISP1181
Philips Semiconductors
ISP1181
Full-speed USB interface
Objective specification
Rev. 01 — 13 March 2000
44 of 69
9397 750 06896
Philips Electronics N.V. 2000. All rights reserved.
16. Power-on reset
The ISP1181 has an internal power-on reset (POR) circuit. Input pin RESET can be
directly connected to V
CC
. The clock signal on output CLKOUT starts 0.5 ms after
power-on and normally requires 3 to 4 ms to stabilize.
The triggering voltage of the POR circuit is 2.0 V nominal. A POR is automatically
generated when V
CC
goes below the trigger voltage for a duration longer than 50
μ
s.
A hardware reset disables all USB endpoints and clears all ECRs, except for the
control endpoint which is fixed and always enabled.
Section 9.3
explains how to
(re)initialize the endpoints.
If enabled, the 24 kHz LazyClock frequency will be output on pin CLKOUT during ‘suspend’ state.
Fig 15. CLKOUT signal timing at ‘suspend’ and ‘resume’.
handbook, full pagewidth
MGS776
WAKEUP
1.8 to 2.2 ms
0.5 ms
PLL circuit stable
3 to 4 ms
SUSPEND
CLKOUT
t
1
: clock is running
t
2
: BUS_CONF pins are sampled
t
3
: registers are accessible
(1) Supply voltage (5 V or 3.3 V), connected externally to pin RESET.
Fig 16. Power-on reset timing.
handbook, full pagewidth
MGT026
t1
t2
t3
VCC
(1)
2.0 V
0 V
350
μ
s
>
50
μ
s
1 ms
1 ms
POR
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ISP1181A 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Full-speed Universal Serial Bus peripheral controller
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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