描述 Description

The HD404849 series of HMCS400-series microcomputers is designed to increase program productivity and also incorporate large-capacity memory. Each microcomputer has an LCD controller/driver, A/D converter, input capture circuit, 32-kHz oscillator for clock use, and four low-power dissipation modes.

特性 Features

? 35 I/O pins, including nine high-current pins (15 mA, max.), eight pins multiplexed with LCD segment pins, and four pins multiplexed with analog input pins

? Four timer/counters

? Eight-bit input capture circuit

? Three timer outputs (including two PWM outputs)

? Two event counter inputs (including one in which the detection edge is programmable)

? Clock-synchronous 8-bit serial interface

? A/D converter (8 channels × 8 bits)

- Operation voltage 2.7 V to 6.0 V

? LCD driver (32 segments × 4 commons)

? Built-in oscillators

- Main clock: Can be driven by ceramic oscillator, crystal oscillator, or external clock.

- Subclock: 32.768-kHz crystal

? Ten interrupt sources

- Four by external sources, including two in which the detection edge is programmable

- Six by internal sources

? Subroutine stack up to 16 levels, including interrupts

? Four low-power dissipation modes

- Standby mode

- Stop mode

- Watch mode

- Subactive mode

? One external input for transition from stop mode to active mode

? Instruction cycle time: 0.89 μs (fOSC = 4.5 MHz)

? Operation voltage

- VCC = 2.7 V to 6.0 V (subactive mode: 2.2 V to 6.0 V) (HD404848, HD404849)

- VCC = 2.7 V to 5.5 V (HD4074849)

? Two operating modes

- MCU mode (HD404848, HD4048412, HD404849)

- MCU/PROM mode (HD4074849 only)