參數(shù)資料
型號： PCI1520I
廠商： Texas Instruments, Inc.
英文描述： PC CARD CONTROLLERS
中文描述： PC卡控制器
文件頁數(shù)： 46/138頁
文件大?。?/td> 745K
代理商： PCI1520I
310
Speaker
Subsystem
BINARY_SPKR
System
Core Logic
PCI1520
CAUDPWM
SPKROUT
PWM_SPKR
Figure 36. Sample Application of SPKROUT and CAUDPWM
3.5.8
LED Socket Activity Indicators
The socket activity LEDs are provided to indicate when a PC Card is being accessed. The LEDA1 and LEDA2 signals
can be routed to the multifunction terminals. When configured for LED outputs, these terminals output an active high
signal to indicate socket activity. LEDA1 indicates socket 0 (card A) activity, and LEDA2 indicates socket 1 (card B)
activity. The LED_SKT output indicates socket activity to either socket 0 or socket 1. See Section 4.30,
Multifunction
Routing Register
,
for details on configuring the multifunction terminals.
The active-high LED signal is driven for 64-ms. When the LED is not being driven high, it is driven to a low state. Either
of the two circuits shown in Figure 37 can be implemented to provide LED signaling, and the board designer must
implement the circuit that best fits the application.
The LED activity signals are valid when a card is inserted, powered, and not in reset. For PC Card-16, the LED activity
signals are pulsed when READY/IREQ is low. For CardBus cards, the LED activity signals are pulsed if CFRAME,
IRDY, or CREQ are active.
PCI1520
Application-
Specific Delay
Current Limiting
R
≈
500
PCI1520
Current Limiting
R
≈
500
LED
LED
Figure 37. Two Sample LED Circuits
As indicated, the LED signals are driven for a period of 64 ms by a counter circuit. To avoid the possibility of the LEDs
appearing to be stuck when the PCI clock is stopped, the LED signaling is cut off when the SUSPEND signal is
asserted, when the PCI clock is to be stopped during the clock run protocol, or when in the D2 or D1 power state.
If any additional socket activity occurs during this counter cycle, then the counter is reset and the LED signal remains
driven. If socket activity is frequent (at least once every 64 ms), then the LED signals remain driven.
3.5.9
CardBus Socket Registers
The PCI1520 contains all registers for compatibility with the
1997 PC Card Standard
. These registers exist as the
CardBus socket registers and are listed in Table 36.
相關PDF資料
PDF描述
PCI4410A PC CARD AND OHCI CONTROLLER
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相關代理商/技術參數(shù)
參數(shù)描述
PCI1520IGHK 功能描述:外圍驅(qū)動器與原件 - PCI PC CARD CONTROLLER RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
PCI1520IGHKEP 功能描述:外圍驅(qū)動器與原件 - PCI Mil Enhance PC Card Cntrlr Data Manual RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
PCI1520IPDV 功能描述:外圍驅(qū)動器與原件 - PCI PC CARD CONTROLLER RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
PCI1520IPDV 制造商:Texas Instruments 功能描述:IC CONTROLLER PC CARD SMD
PCI1520IPDVEP 功能描述:外圍驅(qū)動器與原件 - PCI Mil Enhance PC Card Cntrlr Data Manual RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
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