M37905M8C Просмотр технического описания (PDF) - Mitsumi

Номер в каталоге

Компоненты Описание

производитель

M37905M8C

16 BIT CMOS MICROCOMPUTER

Mitsumi 

PRELIMINARY NSootimcee: pTahriasmisentroict alimfinitsalasrpeescuifbicjeactitotno. change.

MITSUBISHI MICROCOMPUTERS

M37905M4C-XXXFP, M37905M4C-XXXSP

M37905M6C-XXXFP, M37905M6C-XXXSP

M37905M8C-XXXFP, M37905M8C-XXXSP

16-BIT CMOS MICROCOMPUTER

BIU structure

The BIU consists of four registers shown in Figure 6. Table 1 lists the

functions of each register.

Table 1. Functions of each register

Name

Functions

Program address register

Indicates a storage address for an instruction to be next taken into an instruction queue buffer.

Instruction queue buffer

Temporarily stores an instruction which has been taken from a memory. Consists of 10 bytes.

Data address register

Indicates an address where data will be next read from or written to.

Data buffer

Temporarily stores data which has been read from internal memory or internal peripheral devices by the

BIU; or temporarily stores data which is to be written to internal memory or internal peripheral devices

by the CPU. Consists of 32 bits.

b23

b0

PA

b7 b0

Q0

b23

DA

b31

DQ

Fig. 6 Register structure of BIU

Q9

b0

b0

Program address register

Instruction queue buffer

Data address register

Data buffer

16

Share Link: