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M30240M4

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Mitsumi 

Preliminary Specifications REV. E

Specifications in this manual are tentative and subject to change

Mitsubishi microcomputers

M30240 Group

Overview

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

1.7 Overview

The M30240 group is a single chip PC peripheral microcontroller based on the Universal

Serial Bus (USB) Version 1.1 specification. This device provides interface between a USB-

equipped host computer and PC peripherals such as telephones, audio systems, and digital

cameras. The M30240 block diagram is shown in Figure 1.4.

The USB function control unit of the M30240 group can support all four data transfer types

listed in the USB specification: Isochronous, Interrupt, Bulk, and Control. Each transfer type is

used for controlling a different set of PC peripherals. Isochronous transfers provide guaranteed

bus access, a constant data rate, and error tolerance for devices such as computer-telephone

integration (CTI) and audio systems. Interrupt transfers are designed to support human input

devices (HID) that communicate small amounts of data infrequently. Bulk transfers are

necessary for devices such as digital cameras and scanners that communicate large amounts

of data to the PC as bus bandwidth becomes free. Finally, control transfers are supported

and are useful for bursty, host-initiated type communication where bus management is the

primary concern.

1 - 12MHz

frequency 48 MHz

synthesizer

UART x 3

RAM

LED Drivers

ROM

D+

(X 8)

Timers x 8

M16C CPU

Watchdog

D-

Timer

A-D

Converter

CRC Circuit

DMAC x 2

FIFOs

(Normal MCU or DMA Transfer)

I/O Ports (P0~P3, P6 ~ P8, P10)

Figure 1.4: M30240 block diagram

1-10

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