7733 datasheet(51/940 Pages) RENESAS

Nome de Peças	7733

Descrição Electrónicos	16-BIT SINGLE-CHIP MICROCOMPUTER

PDF	940 Pages

Scroll/Zoom	100%

Fabricante Electrônico	RENESAS [Renesas Technology Corp]

Página de início	http://www.renesas.com

Logo

51 / 940 page

CENTRAL PROCESSING UNIT (CPU)

7733 Group User’s Manual

2–12

2.2.2 Functions of bus interface unit (BIU)

The bus interface unit (BIU) consists of four registers shown in Figure 2.2.2. Table 2.2.1 lists each register’s

function.

2.2 Bus interface unit

Table 2.2.1 Each register’s function

Fig. 2.2.2 Registers’ structure of which bus interface unit (BIU) consists

Name

Program address register

Instruction queue buffer

Data address register

Data buffer

Functions

Indicates a store address for an instruction which is next fetched into an instruction

queue buffer.

Temporarily stores an instruction which was fetched.

Indicates an address for data which is next read or written.

Temporarily stores data which was read from the memory • I/O unit by the BIU

or which is to be written to the memory • I/O unit by the CPU.

b23

DBL

DBH

b15

Program address register

Instruction queue buffer

Data address register

Data buffer

7733 Folha de dados(PDF) 51 Page - Renesas Technology Corp