The Winbond 87541VDG/K2 is an embedded controller (EC) for mainstream notebook applications. It contains a highly optimized set of functions, providing a hardware/firmware partition that enables the implementation of flexible solutions; and it incorporates a high-performance 16-bit RISC processor, which enables the EC functionality to be extended via the firmware. In addition, the 87541VDG/K2 contains internal ROM and RAM memories, system support functions and a Bus Interface Unit (BIU) that directly interfaces with both external memory (such as flash) and I/O devices. System support functions include: watchdog, PWM, timers, interrupt control, General-Purpose I/O (GPIO) with internal keyboard matrix scanning, PS/2® Interface, SMBus® interface, and analog-to-digital (ADC) and digital-to-analog (DAC) converters for battery charging, system monitoring and analog controls. The 87541VDG/K2 interfaces with the host via an LPC interface, which provides the host with access to the Keyboard and embedded controller interface channels and to the BIOS flash. Like other members of Winbond’s Advanced I/O family, the 87541VDG/K2 is PC01 and ACPI compliant.

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• Host interface, based on Intel’s LPC Interface Specification Revision 1.1, August 2002
• PC01 Rev 1.0, and ACPI 2.0 compliant
• 16-bit RISC core, with 2 Mbytes address space, running at up to 20 MHz
• Shared BIOS flash memory (external)
• 88 GPIO ports (including keyboard scanning) with a variety of wake-up events
• JTAG-based debugger interface
• Software and hardware controlled clock throttling and extremely low current consumption in Idle mode
• 176-pin LQFP package