參數(shù)資料
型號： ISP1130N
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Universal Serial Bus compound hub with integrated keyboard controller
中文描述： SPECIALTY MICROPROCESSOR CIRCUIT, PDIP56
封裝： PLASTIC, SDIP-56
文件頁數(shù)： 9/68頁
文件大小： 1786K
代理商： ISP1130N
Philips Semiconductors
ISP1130
USB compound hub with keyboard controller
Objective specification
Rev. 01 — 23 March 2000
9 of 68
9397 750 06895
Philips Electronics N.V. 2000. All rights reserved.
6.7 GoodLink
Indication of a good USB connection is provided through GoodLink technology. An
LED can be directly connected via an external 330
resistor. The ISP1130 supports
GoodLink indication for the hub (upstream port) via output MEMSEL/UPGL and for
the two downstream ports via OCn/DPGLn, controlled via bits GL-MEMSELSelection
and EnableOverCurrent in the USBCON register (see
Table 53
).
During enumeration the LED blinks on momentarily. After successful configuration of
the ISP1130, the LED is permanently on. The hub GoodLink indicator blinks off for
approximately 128 ms when the hub receives a packet addressed to it. Downstream
GoodLink indicators blink upon an acknowledgment from the associated port. In
‘suspend’ mode the LED is off.
This feature provides a user-friendly indication of the status of the hub, the connected
downstream devices and the USB traffic. It is a useful diagnostics tool to isolate faulty
USB equipment and helps to reduce field support and hotline costs.
6.8 SoftConnect
The connection to the USB is accomplished by bringing D
+
(for full-speed USB
devices) HIGH through a 1.5 k
pull-up resistor. In the ISP1130, the 1.5 k
pull-up
resistor is integrated on-chip and by default is disconnected from the +3.3 V supply.
The integrated microcontroller controls the connection of the internal resistor on D
+
to
V
pu(3.3)
via bit SoftConnect_N in the USBCON register (see
Table 53
). Bit Connect in
the Device Status register switches on V
pu(3.3)
(default is off) to an alternative external
pull-up resistor. A functional schematic diagram is given in
Figure 4
.
This mechanism allows the microcontroller to complete its initialization sequence
before deciding to establish connection to the USB. Re-initialization of the USB
connection can also be performed without disconnecting the cable.
It should be noted that the tolerance of the internal resistors is higher (30%) than is
specified by the USB specification (5%). However, the overall V
SE
voltage
specification for the connection can still be met with good margin (see
Table 92
). The
decision to use this feature lies with the USB equipment designer.
Fig 4.
SoftConnect control logic.
idth
1.5 k
(internal
pull-up)
1.5 k
(external
pull-up)
Connect
(Device Status
Register)
SoftConnect_N
(Configuration
Register)
ISP1130
3.3 V
supply
UP_DP
MGL920
Vpu(3.3)
相關PDF資料
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相關代理商/技術參數(shù)
參數(shù)描述
ISP1160 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller
ISP1160BD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller
ISP1160BD,157 功能描述:USB 接口集成電路 USB 1.1 HOST CONTROLLER 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20
ISP1160BD/01 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Embedded Universal Serial Bus Host Controller
ISP1160BD/01,118 功能描述:USB 接口集成電路 USB HOST CTRL 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 安裝風格:SMD/SMT 封裝 / 箱體:WLCSP-20
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