M30620FCAFP datasheet(556/615 Pages) RENESAS

Part #	M30620FCAFP

Description	16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

PDF	615 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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556 / 615 page

External Buses

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-239

________

(2) RDY function usage

________

To use the RDY function, set a software wait.

________

The RDY function operates when the BCLK signal falls with the RDY pin at “L”; the bus does not vary

for 1 BCLK, and the state at that moment is held.

________

The RDY function holds the state of bus for the period in which the RDY pin is at “L”, and releases it

________

when the BCLK signal falls with the RDY pin at “H”. Figure 4.4.6 shows an example of RDY circuit

that holds the state of bus for 1 BCLK.

________

Figure 4.4.6. Example of RDY circuit holding state of bus for 1 BCLK

BCLK

CS0

RDY

(1) RDY accepted

(2) RDY cleared

The state of data bus and that of address bus are held for the period between (1) and (2).

BCLK

CS0

RDY

(1)

(2)

(1)

(2)

BCLK

CS0

RDY

(1)

(2)

• Timings in separate bus

• Timings in multiplex bus

(1)

(2)

M30620FCAFP Datasheet(PDF) 556 Page - Renesas Technology Corp

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