描述 Description

The HD404818 Series of 4-bit single-chip HMCS400 series microcomputers provide high program productivity. It incorporates a large size memory, LCD controller/driver, voltage comparator, and 32-kHz watch oscillator circuit.

The HD404818 Series has both standard voltage versions and low voltage versions available. The standard voltage versions operate at 4.0 V to 6.0 V (mask ROM version) and 4.0 V to 5.5 V (PROM version), while the low voltage versions operate at 2.7 V to 6.0 V (mask ROM) and 3.0 V to 5.5 V (PROM). Low voltage versions include an L in their product name.

特性 Features

? 2048-word ×10-bit ROM (HD404812, HD40L4812)

? 4096-word ×10-bit ROM (HD404814, HD40L4814)

? 6144-word ×10-bit ROM (HD404816, HD40L4816)

? 8192-word ×10-bit ROM (HD404818, HD40L4818, HD4074818, HD407L4818)

? 1184-digit ×4-bit RAM

? 30 I/O pins, including 10 high-current output pins, all CMOS and programmable as I/O pull-up MOS

? LCD controller/driver (32 segments ×4 commons)

? Three timer/counters

? Clock-synchronous 8-bit serial interface

? Six interrupt sources

-Two by external sources

-Four by internal sources