PC87570 Datasheet | National Semiconductor

- January 1998 Highlights PRELIMINARY April 1998 PC87570 Keyboard and Power Management Controller Highlights General Description The PC87570 is a highly integrated embedded RISC-based controller optimized for power management (PM), keyboard and mouse (KBC) and system control in portable Personal puter (PC) applications. The PC87570 incorporates National’s pact RISC™ CR16A core, a high performance 16-bit RISC processor core, a Bus Interface Unit (BIU) that directly interfaces with memory and I/O devices, on-chip memory and system support functions. Among these are legacy functions, handled by the Host Bus Interface (HBI), that include the Real-Time Clock and Advanced Power Control (RTC and APC), and peripherals, including: frequency-multiplier-based High Frequency Clock Generator (HFCG), Power Mode Control (PMC), Interrupt Control Unit (ICU), Multi-Input Wake-Up (MIWU), General Purpose I/O Ports (GPIO) with internal keyboard matrix scanning, PS/2® Interface, ACCESS.bus® (ACB) Interface, two Multi-Function 16-Bit Timers (MFT16), periodic interrupt timer and WATCHDOG™ (TWD), ADC and DAC. The PC87570 highly efficient architecture and its on-chip peripherals, supporting functions and low power consumption, provide a highly integrated solution for portable notebook PCs, sub-notebook PCs and other portable devices. Outstanding Features q q q q q q Shared BIOS memory Fully ACPI-pliant embedded controller Proprietary PS/2 shift mechanism Extremely low current consumption in Idle mode Support for a variety of off-chip wake-up sources Scalable design for growth without controller upgrade Block Diagram CR16A Core Processing Unit Core Bus Bus Adapter Memory RAM ROM BIU Peripheral Bus Host Config KBC + PM Host I/F RTC + APC GPIO KBSCAN MIWU HFCG ACB I/F PS/2 I/F Timer + WDG MFT16 (X2) ADC Legacy PMC HBI Peripherals Host Bus (ISA patible) 32.768 KHz External Memory + I/O pact RISCTM, WATCHDOGTM and TRI-STATE® are trademarks of...