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參數(shù)資料
| 型號： | IT8673F |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | GT 35C 35#12 SKT PLUG |
| 中文描述： | 先進的輸入/輸出（高級I / O）的初步規(guī)范V0.5 |
| 文件頁數(shù)： | 52/128頁 |
| 文件大?。?/td> | 780K |
| 代理商： | IT8673F |
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IT8673F
11.2 Advanced Power Supply Control and PME#
The circuit for advanced power supply control (APC) provides three power-up events, Keyboard, Mouse,
and RING#. When any of these three events is true, PWRON# will perform a low state until VCC is switched
to ON state. The three events include:
1. Detection of RING# pulse or pulse train on the programmed RING# input pin(LDN=04h, Index=FBh, bits
6-4).
2. Detection of KCLK edge or special pattern of KCLK and KDAT. The special pattern of KCLK means
pressing pre-set key string sequentially, and KDAT means pressing pre-set keys simultaneously.
3. Detection of MCLK edge or special pattern of MCLK and MDAT. The special pattern of MCLK and MDAT
means double clicking on any mouse buttons.
The PANSWH# and PSON are especially designed for PIIX4. PANSWH# serves as a main power switch
input which is wire-AND to the APC output PWRON#. PSON is the ATX Power control output, which is a
power-failure gating circuit. The power-failure gating circuit is responsible for gating the SUSC# until
PANSWH# becomes active when the VCCH is switched from OFF to ON.
The power-failure gating circuit can be disabled by setting the APC/PME Control Register 2 (LDN=04h,
Index=F4h, bit 5). The gating circuit also provides an auto-restore function. When the bit 5 of PCR1 is set,
the previous PSON state will be restored when the VCCH is switched from OFF to ON.
The RING# function is used to power on the system from modem, fax, etc. It can be programmed to detect
a pulse train with pulse low.
The Mask PWRON# Activation bit (bit 4 of PCR 1) is used to mask all Power-up events except Switch on
event when the VCCH state is just switched from FAIL to OFF. In other words, when this bit is set and the
power state is switched from FAIL to OFF, the only validated function is PANSWH#.
The PCR2 register is responsible for determining the Keyboard power up events and APC conditions. Bit 7
of PCR2 is used to select the function of pin 93 (APC Power up events or PCI PME# output). Bit 4 is used to
mask the PANSWH# power-on event. To enable this bit, the keyboard power-up event should be enabled
and set by (1) pressing pre-set key string sequentially or (2) stroking pre-set keys simultaneously. The
APC/PME# special code index and data registers are used to specify the special key codes in the special
power-up events of (1) pressing pre-set key string sequentially or (2) stroking pre-set keys simultaneously.
When bit 7 of PCR2 is set to 1, PME# function is selected. There are two differences. When any one of the
three power-up events is true, the output of pin 115 goes low until the corresponding status bit is written to
“1”. PME# function is validated in both VCC ON and OFF states.
All APC registers (Index=F0h, F2h, F4h, F5h and F6h) are powered by back-up power (VBAT) when VCCH
is OFF.
11.3 FAN Controller
The FAN Controller, built in the IT8673F, include three FAN Tachometers, and three sets of advanced FAN
Controllers. FAN Tachometer inputs are digital inputs with an acceptable input range of 0V to 5V, and are
responsible for measuring the FAN’s Tachometer pulse periods. FAN_TAC1 and FAN_TAC2 are included
with programmable divisors, and can be used to measure different fan speed ranges. FAN_TAC3 is
included with fixed divisor, and can only be used in default range.
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相關(guān)代理商/技術(shù)參數(shù) |
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| IT8687R | 制造商:ITE 功能描述: |
| IT86B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|600V V(DRM)|8A I(T)RMS|TO-220 |
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| IT86G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:TRIAC|600V V(DRM)|8A I(T)RMS|TO-220 |
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