1 Hardware Overview 1.2 System Unit Block Diagram
1-10 TECRA S1 Maintenance Manual
•
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)