DMP Electronics eBOX-3350MX-AP Instrukcja Użytkownika Pobierz pdf (Strona 23)

386SX Single Chip PC Jan Yin Chan Electronics Co.,LTD.

DM&P M6117D : System on a chip

Page 22

Jan Yin Chan Electronics Co,. LTD. M6117D 386SX Single Chip PC

8F-1,No.22,Wuchyuan 2RD.,Hsin Chuang city Taipei Hsien, Taiwan, R.O.C. Tel: 886-(02) 2298-0770 Fax: (02) 2299-1883

(B) D[0] of index 12h is high

BCLK2

BCLK1

CASJ

RDY0J

WEJ

COL 1 COL 2

COL 4

COL 3

(g) RAS precharge time insert wait

There are two bits to control RAS precharge timing, one is D[5] of index 11h, another is D[0] of the same index. Table

as follows is the precharge time related to bit setting.

Index 11h : D[5]

D[0] Pre-charge time

0 0 2.5T

0 1 1.5T

1 X 3.5T

BCLK2

BCLK1

RASJ

CASJ

RASJ

CASJ

RASJ

CASJ

1.5T

2.5T

3.5T

1.5T

3.5T

2.5T

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 111 112

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DMP Electronics eBOX-3350MX-AP Instrukcja Użytkownika Strona 23