LC87F74C8A

Ordering number : ENN7825 LC87F74C8A Overview CMOS IC FROM 128K-byte, RAM 4096-byte on chip 8-bit 1-chip Microcontroller The LC87F74C8A is an 8-bit single chip microcontroller with the following on-chip functional blocks : CPU : operable at a minimum bus cycle time of 100ns 128K-bytes flash ROM (on-board rewritable) On-chip RAM : 4096-bytes LCD controller/driver Two high performance 16-bit timer/counters (can be divided into 8-bit units) 16-bit timer/PWM (can be divided into two 8-bit timers) Four 8-bit timer with prescalers Timer for use as date/time clock Synchronous serial I/O port (with automatic block transmit/receive function) Asynchronous/synchronous serial I/O port 15-channel × 8-bit AD converter High-speed clock counter System clock divider Small signal detector 20-source 10-vectored interrupt system All of the above functions are fabricated on a single chip. Features ■Flash ROM Single 5V power supply, on-board writable Block erase in 128-byte units 131072 × 8-bits (LC87F74C8A) ■Random access memory (RAM) 4096 × 9-bits (LC87F74C8A) ■Minimum bus cycle time 100ns (10MHz) Note : The bus cycle time indicates ROM read time. Ver.1.02 82202 83004 JO IM No.7825-1/21 LC87F74C8A ■Minimum instruction cycle time 300ns (10MHz) ■Ports Input/output ports Data direction programmable for each bit individually : 26 (P1n, P30 to P35, P70 to P73, P8n) Data direction programmable in nibble units : 8 (P0n) (When N-channel open drain outp...