This post explains for the semiconductor IT8720F.
The Part Number is IT8720F.
The function of this semiconductor is Environment Control – Low Pin Count Input / Output.
Manufacturers : ITE TECH ( www.ite.com.tw ), Package : 128-QFP Type.
Preview images :
The IT8720F contains one Fan Speed Controller. The fan speed controller can control up to five fan speeds
through three separate 128 steps of Pulse Width Modulation (PWM) output pins and monitor up to five FANs’
Tachometer inputs. It also features two 16C550 UARTs, one IEEE 1284 Parallel Port, one Floppy Disk
Controller and one Keyboard Controller.
Integrated in the IT8720F are eight logical devices. One high-performance 2.88MB floppy disk controller, with digital data separator, supporting two drives in 360K/720K/1.2M/1.44M/2.88M format. One multi-mode highperformance parallel port supporting bi-directional Standard Parallel Port (SPP), Enhanced Parallel Port (EPP V. 1.7 and EPP V. 1.9), and IEEE 1284 compliant Extended Capabilities Port (ECP). Two 16C550 standard compatible enhanced UARTs perform asynchronous communication, and also support IR interface. The device also features one fan speed controller which controls and monitors five fans, and eight GPIO ports controlling up to 63 GPIO pins. The IT8720F also has an integrated Keyboard Controller.
1. Low Pin Count Interface
− Complies with Intel Low Pin Count Interface
Specification Rev. 1.1
− Supports LDRQ#, SERIRQ protocols
− Supports PCI PME# Interfaces
2. ACPI & LANDesk Compliant
− ACPI V. 2.0 compliant
− Register sets compatible with “Plug and Play
ISA Specification V. 1.0a”
− LANDesk 3.X compliant
− Supports 8 logical devices