HD40L4808

The HD40L4808 is a kind of 4-bit single chip microcomputer unit which provides high program productivity. HD40L4808 incorporates large size memory, LCD driver/controller, voltage comparator, and 32 kHz watch oscillator circuit.

There are some features of HD40L4808 as follows: (1)8192 words of 10-bit ROM; (2)1184 digits of 4-bit RAM; (3)30 I/O pins: including 10 high-current output pins; I/O pin circuit configuration; input/output pull-up MOS can be selected by software; (4)16-digit LCD driver; (5)three timers/counters; (6)clock synchronous 8-bit serial interface; (7)six interrupt sources: external: 2; internal: 4; (8)subroutine stack: up to 16 levels including interrupts; (9)instruction cycle time: 5s (fosc=800 kHz); (10)four low power dissipation modes: standby mode, stop mode, watch mode and subactive mode (functional option); (11)internal oscillator: crystal ceramic filter; external clock is available; (12)voltage comparator (2 channels); (13)operation modes: MCU mode; (14)package: 80-pin flat plastic package.

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