描述 Description

The HD404889, HD404899, and HD404868 Series comprise low-voltage, 4-bit single-chip microcomputers with a variety of on-chip supporting functions that include an LCD circuit, A/D converter, multifunctional timers, and large-current I/O pins. These devices are suitable for system and display panel control in a wide range of applications, including pagers, remote controllers, and home appliances equipped with an LCD display.

特性 Features

? 46 I/O pins (HD404889/HD404899/HD404878 Series)

41 I/O pins (HD404868 Series)

Large-current I/O pins (source: 10 mA max.):4

Large-current I/O pins (sink: 15 mA max.): 8 (HD404889/HD404899/HD404878 Series)

6 (HD404868 Series)

LCD segment multiplexed pins:16

Analog input multiplexed pins: 6 (HD404889 and HD404899 Series)

4 (HD404868 Series)

? Four Timer/counters

8-bit timer: 2 (HD404889/HD404899/HD404878 Series)

1 (HD404868 Series)

16-bit timer:1 (Can also be used as two 8-bit timer)

? 8-bit input capture circuit (HD404889/HD404899/HD404878 Series)

? Two timer outputs (including PWM out-put)

? Two event counter inputs (edge-programmable) (HD404889/HD404899/HD404878 Series)

One event counter input (edge-programmable) (HD404868 Series)

? Clock-synchronous 8-bit serial interface

? A/D converter

6 channels × 8-bit (HD404889 Series)

6 channels × 10-bit (HD404899 Series)

4 channels × 10-bit (HD404868 Series)

? LCD controller/driver (32 segments × 4 commons) (HD404889/HD404899/HD404878 Series)

(24 segments × 4 commons) (HD404868 Series)

? On-chip oscillators

- Main clock (ceramic resonator, crystal resonator, or external clock operation possible)

- Sub-clock (32.768 kHz crystal resonator)

? Interrupts

External: 3 (including one edge-programmable)

Internal : 6 (HD404889 and HD404899 Series)

: 5 (HD404878 and HD404868 Series)

? Subroutine stack up to 16 levels, including interrupts

? Four Low-power dissipation modes

? Module standby (timers, serial interface, A/D converter)

? System clock division software switching (1/4 or 1/32)

? Inputs for return from stop mode (wakeup): 4

? Instruction execution time

Min. 0.89 μs (fOSC = 4.5 MHz)

? Operation voltage

1.8 V to 5.5 V