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參數(shù)資料
| 型號： | LPC47M112 |
| 廠商： | SMSC Corporation |
| 英文描述： | ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE |
| 中文描述： | 增強的超級I / O控制器，LPC接口 |
| 文件頁數(shù)： | 25/228頁 |
| 文件大?。?/td> | 1269K |
| 代理商： | LPC47M112 |
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SMSC DS – LPC47M192
Page 25
Rev. 03/30/05
DATASHEET
Other Pins:
-
IRTX2/GP35 (output, buffer powered by VTR)
-
GP53/TXD2(IRTX) (output, buffer powered by VTR)
-
GP60/LED1 (output, buffer powered by VTR)
-
GP61/LED2 (output, buffer powered by VTR)
6.4 32.768 kHz Trickle Clock Input
The LPC47M192 utilizes a 32.768 kHz trickle input to supply a clock signal for the fan tachometer logic, LED
blink and wake on specific key function.
6.4.1 INDICATION OF 32KHZ CLOCK
There is a bit to indicate whether or not the 32kHz clock input is connected to the LPC47M192. This bit is
located at bit 0 of the CLOCKI32 register at 0xF0 in Logical Device A. This register is powered by VTR and
reset on a VTR POR.
Bit[0] (CLK32_PRSN) is defined as follows:
0=32kHz clock is connected to the CLKI32 pin (default)
1=32kHz clock is not connected to the CLKI32 pin (pin is grounded).
Bit 0 controls the source of the 32kHz (nominal) clock for the fan tachometer logic, the LED blink logic and the “wake
on specific key” logic. When the external 32kHz clock is connected, that will be the source for the fan tachometer,
LED and “wake on specific key” logic. When the external 32kHz clock is not connected, an internal 32kHz clock
source will be derived from the 14MHz clock for the fan tachometer, LED and “wake on specific key” logic.
The following functions will not work under VTR power (VCC removed) if the external 32kHz clock is not connected.
These functions will work under VCC power even if the external 32 kHz clock is not connected.
Fan Tachometer
Wake on specific key
LED blink
6.5 Internal PWRGOOD
An internal PWRGOOD logical control is included to minimize the effects of pin-state uncertainty in the host
interface as V
cc
cycles on and off. When the internal PWRGOOD signal is “1” (active), V
cc
> 2.3V (nominal),
and the LPC47M192 host interface is active. When the internal PWRGOOD signal is “0” (inactive), V
cc
<=
2.3V (nominal), and the LPC47M192 host interface is inactive; that is, LPC bus reads and writes will not be
decoded.
The LPC47M192 device pins IO_PME#, CLOCKI32, KDAT, MDAT, nRI1, nRI2, RXD2 and most GPIOs (as
input) are part of the PME interface and remain active when the internal PWRGOOD signal has gone inactive,
provided V
TR
is powered. The IRTX2/GP35, GP53/TXD2(IRTX), GP60/LED1 and GP61/LED2 pins also
remain active when the internal PWRGOOD signal has gone inactive, provided V
TR
is powered. See Trickle
Power Functionality section. The internal PWRGOOD signal is also used to disable the IR Half Duplex
Timeout.
6.6 Maximum Current Values
See the “Operational Description” section for the maximum current values.
6.6.1 SUPER I/O FUNCTIONS
The maximum VTR current, I
TR
, is given with all outputs open (not loaded), and all inputs transitioning from/to
0V to/from 3.3V. The total maximum current for the part is the unloaded value PLUS the maximum current
sourced by the pin that is driven by VTR. The pins that are powered by VTR are as follows: GP42/nIO_PME,
IRTX2/GP35, GP53/TXD2(IRTX), GP60/LED1, GP61/LED2, and CLKI32. These pins, if configured as push-
pull outputs, will source a minimum of 6mA at 2.4V when driving.
The maximum VCC current, I
CC
, is given with all outputs open (not loaded) and all inputs transitioning from/to
0V to/from 3.3V.
相關(guān)PDF資料 |
PDF描述 |
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| LPC47M112-MC | ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE |
| LPC47M112-MW | ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE |
| LPC47N252-SD | Advanced Notebook I/O Controller with On-Board FLASH |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LPC47M112_07 | 制造商:SMSC 制造商全稱:SMSC 功能描述:Enhanced Super I/O Controller with LPC Interface |
| LPC47M112-MC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LPC47M112-MW | 功能描述:以太網(wǎng) IC Enhanced Super I/O Cntrl LPC Interface RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| LPC47M133-NC | 制造商:SMSC 功能描述: |
| LPC47M140-NC | 制造商:SMSC 制造商全稱:SMSC 功能描述:128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB |
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