Renesas Electronics 7540
The 7540 Group is the 8-bit microcomputer based on the 740 family core technology. The 7540 Group has a serial I/O, 8-bit timers, a 16-bit timer, and an A/D converter, and is useful for control of home electric appliances and office automation equipment.DESCRIPTION
FEATURES
● Basic machine-language instructions ...................................... 71● The minimum instruction execution time ......................... 0.34 µs (at 6 MHz oscillation frequency, double-speed mode for the shortest instruction)
● Memory size ROM ............................................ 8 K to 32 K bytes RAM ............................................. 384 to 768 bytes
● Programmable I/O ports ....................... 29 (25 in 32-pin version)
● Interrupts ................................................. 15 sources, 15 vectors ................................. (14 sources, 14 vectors for 32-pin version)
● Timers ............................................................................. 8-bit ✕ 4 ...................................................................................... 16-bit ✕ 1
● Serial I/O1 ................... 8-bit ✕ 1 (UART or Clock-synchronized)
● Serial I/O2 (Note 1) ..................... 8-bit ✕ 1 (Clock-synchronized)
● A/D converter ...............................................