King Billion Electronics Co., Ltd

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HF88M02

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.

Pad No.

Pin Name X Coord.e Y Coord.

Pad No.

Pin Name X Coord.

Y Coord.

5

P03

108.33

1182.31

26

NC

2978.86

1195.14

6

P02

108.33

994.87

27

NC

2978.86

1355.14

7

P01

108.33

807.59

28

P13

2978.87

1495.14

8

P00

108.33

620.15

29

P11

2978.87

1635.14

9

NC

108.33

432.98

30

P10

2978.87

1775.14

10

D0

108.33

171.72

31

P15

2978.87

1915.14

11

D1

525.97

101.14

32

P16

2978.87

2055.13

12

D2

713.13

101.14

33

RS1

2237.66

2066.92

13

GND

1077.39

125.28

34

RS2

2050.22

2066.92

14

GND

1267.83

125.48

35

VDD

1708.76

2013.72

15

GND

1651.38

105.09

36

VDD

1534.34

2013.72

16

D3

1814.02

106.14

37

VDD

1359.92

2013.72

17

D4

2001.18

106.14

38

WEN

1159.22

2052.30

18

D5

2188.62

106.14

39

RS0

971.19

2052.30

19

D6

2375.78

106.14

40

P17

625.57

2052.30

20

D7

2975.87

103.39

41

P14

438.13

2052.30

21

CEN

2975.87

242.79

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.

In addition to Data File mode, the device also provide the expansion I/O capability. Two ports of I/O

pins (8 bit each) are provided.

The I/O ports can be configured to function as output pin or

high-impedance input pins. Only 14 pins, CEn, WEn, OEn, RS2, RS1 and D0 ~ D7 are required to

provide the Data File function and full access to two I/O ports.