8050D N/B Maintenance

1.3.13 Keyboard System: Winbond W83L950D

The Winbond Keyboard controller architecture consists of a Turbo 51 core controller surrounded by various registers, nine general purpose I/O port, 2k+256 bytes of RAM, four timer/counters, dual serial ports, 40K MTP- ROM that is divided into four banks, two SMBus interface for master and slave, Support 4 PWM channels, 2 D-A and 8 A-D converters. 2

￿ 8051 uC based

￿ Keyboard Controller Embedded Controller

￿ Supply embedded programmable flash memory (internal ROM size: 40KB) and RAM size is 2 KB.

Secret

￿ Support 4 Timer (8 bit) signal with 3 prescalers.

MiTac

Document

 

￿ Support 72 useful GPIOs totally

￿ Support 2 PWMConfidentialchannels, 2 D-A and 8 A-D converters. ￿ Reduce Firmware burden by Hardware PS/2 decoding

￿ Support Flash utility r on board re-flash￿ Support ACPI

￿Hardware fast Gate A20 with software programmable

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