 | Modules Identified
1. Keypad Scanning and Decoding
2. Dialer
3. LCD
4. CD-ROM driver and search Module
5. EEPROM interface for Mini-telephone Book |
| Database Format of the Directory
1. Format does not conform to xbase standard
2. Format to be clarified with aid from MTNL |
| Minimizing the number of keys on the Keypad
1. Keys will be overloaded using multiple presses |
| Interfacing of the above mentioned modules with the 8x51
1. One 8255 for the CD ROM drive
2. Interfacing the 8255 (8+5 lines), keypad (8 lines),
Dialer (8 lines), LCD (8/4 + 3 lines) and the EEPROM (?? lines) with the 8x51
by memory mapped I/O |
