pc97551笔记本io芯片.pdfVIP

P C 9 7 5 5 1 E m b e d d e d C o n t r o lle r f o r N o t e b o o k S y s t e m s ? 2006 Winbond Electronics Corporation Product Brief February 2006 Revision 1.1 PC97551 Embedded Controller for Notebook Systems General Description The Winbond PC97551 is an embedded controller (EC) for mainstream notebook applications. It includes a highly opti- mized set of functions, which provide a hardware/firmware partition that enables the implementation of flexible solu- tions; and its high-performance CPU core enables EC func- tionality to be extended via the firmware. The PC97551 incorporates National’s CompactRISC ? CR16B core (a high-performance 16-bit RISC processor), internal ROM and RAM memories, system support functions and a Bus Interface Unit (BIU) that directly interfaces with both ex- ternal 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 ? inter- face, analog-to-digital (ADC) and digital-to-analog (DAC) converters for battery charging circuitry, system monitoring and analog controls. The PC97551 interfaces with the host via an LPC interface that provides the host with access to the Keyboard and em- bedded controller interface channels and to the BIOS flash. Like other members of Winbond’s Advanced I/O family, the PC97551 is PC01 and ACPI compliant. Outstanding Features ■ Host interface, based on Intel’s LPC Interface Specifi- cation Revision 1.1, August 2002■ PC2001 Rev 1.0, and ACPI 3.0 compliant■ 16-bit RISC core, with 2 Mbytes address space, run- ning at up to 20 MHz■ Shared BIOS flash memory (external)■ 92 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 and FBGA packages System Block Diagram Lid Display Switch