Toshiba TECRA S1 manual Hardware Overview System Unit Block Diagram

1 Hardware Overview 1.2 System Unit Block Diagram

•EC

−Power supply sequence control

−Thermal control

−LED control

−Beep control

−Device ON/OFF

−Cooling fan speed control

−Universal I/O port

−Dock power supply control

−Battery capacity check

−Flash memory reprogramming function

−EC access interface

−I2C communication control

RS-232C driver

•MAX3243

−Conversion of signal levels for communication with an external device

Battery E2 PROM

•24C02 equivalent (128 words x 16 bits, I2C interface) integrated in the battery pack

−Storing records of battery use

Clock Generator

•ICS950810A

−Generating the clock signal required for the system

Modem Controller

•Built-in MDC card with XircomLucent Mars3+SiDAA

•Functions of the modem controller:

−Digital signal conductor protection

−Ring wake-up support

−Communication codes supported:

For data communication:

V.90 (56K bps) data communication control

V.32 bis (14.4K, 12K, 9600)

V.22 bis (2400, 1200)

V.22 (1200)

V.23 (1200, 600, 75)

V.21 (300)

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