HD6432142 datasheet(5/1177 Pages) RENESAS

5 / 1177 page

Rev. 4.00 Sep 27, 2006 page v of xliv

Preface

The H8S/2148 Group, H8S/2144 Group, and H8S/2147N comprise high-performance

microcomputers with a 32-bit H8S/2000 CPU core, and a set of on-chip supporting functions

required for system configuration.

The H8S/2000 CPU can execute basic instructions in one state, and is provided with sixteen

internal 16-bit general registers with a 32-bit configuration, and a concise and optimized

instruction set. The CPU can handle a 16-Mbyte linear address space (architecturally 4 Gbytes).

Programs based on the high-level language C can also be run efficiently.

Single-power-supply flash memory (F-ZTAT™*) and mask ROM versions are available,

providing a quick and flexible response to conditions from ramp-up through full-scale volume

production, even for applications with frequently changing specifications.

On-chip peripheral functions include a 16-bit free-running timer (FRT), 8-bit timer (TMR),

watchdog timer (WDT), two PWM timers (PWM and PWMX), a serial communication interface

(SCI, IrDA), PS/2-compatible keyboard buffer controller, host interface (HIF), D/A converter

(DAC), A/D converter (ADC), and I/O ports. An I

2C bus interface (IIC) can also be incorporated

as an option.

An on-chip data transfer controller (DTC) is also provided, enabling high-speed data transfer

without CPU intervention.

The H8S/2148 Group has all the above on-chip supporting functions, and can also be provided

with an IIC module as an option. The H8S/2144 Group comprises reduced-function versions, with

fewer TMR channels, and no PWM, keyboard buffer controller, HIF, IIC, or DTC modules, and

the H8S/2147N with fewer TMR channels, no DTC and some other functions.

Use of the H8S/2148 Group, H8S/2144 Group, H8S/2147N enables compact, high-performance

systems to be implemented easily. The comprehensive PC-related interface functions and 16

× 8

matrix key-scan functions are ideal for applications such as notebook PC keyboard control and

intelligent battery and power supply control, while the various timer functions and their

interconnectability (timer connection), plus the interlinked operation of the I

2C bus interface and

data transfer controller (DTC), in particular, make these devices ideal for use in PC monitors. In

addition, the combination of F-ZTAT™* and reduced-function versions is ideal for applications

such as CD-ROM drive units in which on-chip program memory is essential to meet performance

requirements, product start-up times are short, and program modifications may be necessary after

end-product assembly.

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