128KB Programmable Embedded Flash (eFlash) Silicon Revisions: CXA, CXS, DXA, DXS
In these systems, the IT8995E-128 works in tandem with the main chipset (e.g., Intel HM170 or Whiskey Lake-U42) to manage everything from the high-speed NVMe SSD slots to the external USB-C charging ports.
From a detailed analysis of repair logs on the forum for the ASUS X441NC motherboard, the following pins have been mapped:
| Symbol | Parameter | Min | Max | Unit | |--------|-----------|-----|-----|------| | VCC | Supply voltage | -0.3 | +4.0 | V | | VIN | Input voltage (5V tolerant) | -0.3 | +5.5 | V | | IOH | Output high current per pin | - | 8 | mA | | IOL | Output low current per pin | - | 16 | mA | | TSTG | Storage temperature | -55 | +125 | °C | | TJ | Junction temperature | - | +125 | °C | it8995e 128 datasheet
Have you ever wondered what happens the second you press the power button on your laptop? Before the Windows or macOS logo appears, a tiny but powerful chip—the ITE IT8995E-128 —is already hard at work.
| Pin Group | Pins | Description | |-----------|------|-------------| | VCC (3.3V) | 22, 45, 78, 101 | Main digital power | | VCC_RTC | 32 | Real-time clock backup (2.0V–3.3V) | | VBAT | 33 | Battery backup for CMOS RAM | | XIN / XOUT | 88, 89 | 32.768 kHz crystal input/output | | VSS (GND) | 11, 30, 55, 72, 95, 120 | Multiple grounds for noise reduction |
The IT8995E-128 requires a 32.768 kHz real-time clock crystal for power management timers. Without it, S3/S5 wake-up events fail. | Pin Group | Pins | Description |
Specific rows or columns of the integrated keyboard fail to process character requests. Diagnostic Matrix
The laptop indicator LEDs turn on briefly but drop out within a microsecond.
Note for Technicians: Always back up the original EC firmware dump before attempting to write a new binary file. Ensure the extracted firmware matches the exact motherboard revision, not just the laptop model. 5. Diagnostics and Troubleshooting Common Failures Diagnostic Matrix The laptop indicator LEDs turn on
Dedicated lines to read/write its own operational firmware from a ROM. GPIOA0 - GPIOH7
The IT8995E-128 is designed with a specific focus on low power consumption and high integration to reduce the physical footprint on a motherboard.