Mitsubishi Electric M32R Series User Manual page 725

Mitsubishi 32-bit risc single-chip microcomputers

Table of Contents

(2) When Bus Mode Control Register = 1

A typical connection when using external extension memory is shown in Figure 15.4.2. (External

extension memory can only be used in external extension mode and processor mode.)

Figure 15.4.2 Typical Connection of External Extension Memory (When BUSMOD = 1)

Note : The 32170 addresses and data are arranged in such a way that bit 0 = MSB, and bit 15 =

LSB. Therefore, the MSB and LSB sides must be reversed when connecting external

extension memory.

15.4 Typical Connection of External Extension Memory

Flash memory

BLE (D8-D15)

Number of bus wait cycles can be set to 1-4.

Normally used as port. WAIT is used only when four or more wait cycles are needed.

EXTERNAL BUS INTERFACE

Memory mapping

Internal flash memory