Reverse Engineering A Eftpos Machine Part 2
Its about time i update my progress: Chip listing and datasheet sourcing :85% Keypad side: 1. 7660cbaz (( Simple Conversion of +5V Logic Supply to +/- 5V Suppl y + Features )) 2. SP232Enc - (( High Performance 2x RS-232 Line Drivers/Receivers)) Mcu side(back): 1. HC4053 - (( ANALOGMULTIPLEXER/DEMULTIPLEXER: TRIPLE2CHANNEL)) x 2 , 2. FT232BL - (( FT232BL/BQ USB UART IC)) , 3. 93LC46-81 - (( 1K/2K/4K 2.5V Microwire Serial EEPROM)) , 4. MC33560 - (( Power Management and Interface IC for Smartcard Readers and Couplers)), 5. LM2597 - (( Voltage Regulator, with Features))...