UPD30102 datasheet(96/114 Pages) RENESAS

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µPD30102

Preliminary Data Sheet

(11) System bus parameter (ZWS#) (1/2)

Parameter

Symbol

MIN.

MAX.

Unit

Command signal low-level widthNotes 1, 2

tCLCH

× N – 31

ZWS# delay time (from command signal)Notes 1, 2

tCLZL

× (N – 1) – 20

ZWS# hold time (from command signal)Note 2

tCHZH

0ns

Notes 1. With the VR4102, the MEMW#, MEMR#, IOW#, and IOR# pins are called the command signals for

the system bus interface.

2. The value of N is set by using the WISAA (0:2) bits of the BCUSPEEDREG register.

The value of T is set by using the CLKSEL (0:2) bits (TxD#/CLKSEL2, RTS#CLKSEL1, and

DTR#CLKSEL0).

CLKSEL2

CLKSEL1

CLKSEL0

T (ns)

37.3

40.6

WISAA2

WISAA1

WISAA0

N (TClock)

0008

0017

0106

0115

1Note

0Note

1Note

0Note

1Note

110

—

111

—

Note

If the WISAA (0:2) bits are set to 100B or

high, the AC characteristics of tAVCK and

tCLCK are not guaranteed.

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