M306V2EEFS datasheet(76/271 Pages) RENESAS

부품명	M306V2EEFS

상세설명	SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

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제조업체	RENESAS [Renesas Technology Corp]

홈페이지	http://www.renesas.com

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76 / 271 page

Rev.1.40

Oct 06, 2004 page 76 of 269

M306V2ME-XXXFP, M306V2EEFP

Single-chip mode

Memory expansion mode

Transfer unit

Bus width

Access address

Microprocessor mode

No. of read

No. of write

No. of read No. of write

cyclescyclescyclescycles

16-bit

Even

8-bit transfers

(BYTE= “L”)

Odd

(DMBIT= “1”)

8-bit

Even

—

(BYTE = “H”)

Odd

—

16-bit

Even

16-bit transfers

(BYTE = “L”)

Odd

(DMBIT= “0”)

8-bit

Even

—

(BYTE = “H”)

Odd

—

Table 2.9.2 No. of DMAC transfer cycles

2.9.2 DMAC Transfer Cycles

Any combination of even or odd transfer read and write addresses is possible. Table 2.9.2 shows the

number of DMAC transfer cycles.

The number of DMAC transfer cycles can be calculated as follows:

No. of transfer cycles per transfer unit = No. of read cycles ✕ j + No. of write cycles ✕ k

Internal memory

External memory

Internal ROM/RAM Internal ROM/RAM SFR area

Separate busSeparate bus

Multiplex

/OSD RAM

bus

No wait

With wait

No wait

With wait

212

Coefficient j, k

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