King Billion Electronics Co., Ltd

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HF88M08

January 16, 2004

Page 6 of 19

V1.11

This specification is subject to change without notice. Please contact sales person for the latest version before use.

Die Size: X= 2870 µm, Y=4840 µm, and substrate is connected to GND.

Pad No.

Pad Name X Coord.

Y Coord.

Pad No.

Pad Name X Coord.

Y Coord.

1

WEN

1028.23

4726.24

22

VSS

1222.34

140.91

2

RS0

836.35

4726.24

23

VSS

1501.38

108.09

3

P17

495.57

4722.3

24

D3

1664.02

109.14

4

P14

308.13

4722.3

25

D4

1851.18

109.14

5

P07

108.33

4097.34

26

D5

2038.62

109.14

6

P06

108.33

3743.44

27

D6

2225.78

109.14

7

P05

108.33

3262.4

28

D7

2725.87

105.79

8

P04

108.33

3071.78

29

CEN

2725.87

340.24

9

NC

108.33

2786.78

30

P12

2725.87

537.52

10

NC

108.33

2598.09

31

OEN

2725.87

730.47

11

NC

108.33

2315.6

32

P13

2728.88

3911.29

12

NC

108.33

2127.68

33

P11

2728.88

4116.11

13

NC

108.33

1843.32

34

P10

2728.88

4318.77

14

P03

108.33

1656.15

35

P15

2728.87

4531.23

15

P02

108.33

1357.04

36

P16

2728.87

4725.13

16

P01

108.33

1169.6

37

RS1

2107.66

4736

17

P00

108.33

758.2

38

RS2

1908.12

4736

18

D0

108.33

403.24

39

VDD

1578.76

4688.71

19

D1

395.97

109.14

40

VDD

1404.34

4688.71

20

D2

583.13

109.14

41

VDD

1229.92

4688.71

21

VSS

985.16

190.94

6 Device Operation

The device provides the capability of accessing the contents of ROM array by external MCU not through

standard address and data bus configuration but through minimal number of 8-bit data bus and control

pins. Only 11 pins D7 ~ D0, CEn, OEn, WEn are required to use the device as a Data File device. By

fixing the RS2 to ‘0’, only CEn, WEn, OEn and D0 ~ D7 are required to access the ROM array data.

The CEn pin is device selection pin to uniquely select one device when more than one device are used in

parallel and control the access to Mask ROM contents and internal registers. Whenever CEn goes high,

the internal Mask ROM will enter standby (power saving) mode and accesses to internal registers are

inhibited. Otherwise, it is in active mode. Therefore, when accessing contents of ROM is not intended,

CEn should stay at ‘1’ to conserve the power.