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本帖最后由 迅龙科技 于 2009-10-3 23:47 编辑
CPU: c7-m 1600/800+
桥:VIA MSPⅡ
I/O: IT8502E
待机电流只有0.01 SB3.3 SB5V正常。32.768正常。不加电。
谁有该机型的图纸或I/O资料。有开机时序图更好。头次修这样的本本。
不像笔记本有电源管理芯片。无从下手。看资料该I/O就有电源管理功能。
下面是我搜集的一些该I/O的资料。
键盘控制器 IT8502
The IT8502E/F/G is a highly integrated, embedded controller with an embedded micro controller and integrated advanced functions. It is targeted for a wide range of portable application that uses the Low Pin Count (LPC) interface.
The IT8502E/F/G incorporates an 8032 micro controller which is an 8051-compatible, based on RISC architecture. The IT8502E/F/G provides ACPI embedded controller function, keyboard controller (KBC) and matrix scan, PWM, DAC, ADC and SmartAuto Fan control for hardware monitor, PS/2 interface for external keyboard/mouse devices, system wake up functions for system power management, Watchdog timers, timers and general purpose I/O (GPIO), Consumer IR and SPI flash . It also supports the external flash shared by the host and EC side.
Product Spec of IT8502E
8032TT Embedded Controller SM Bus Controller
LPC Bus Interface System Wake Up Control
External SPI Flash Interface EC Wake Up Control
Interrupt Controller DAC
Timer / Watch Dog Timer PWM with SmartAuto Fan Control
ACPI Power Management Channel KB Matrix Scan
GPIO Power Consumption
KBC Interface 128-pin LQFP/QFP/TFBGA
ADC
VGTF_ITE_09Q2.pdf
(590.4 KB, 下载次数: 73)
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