KING BILLION ELECTRONICS CO., LTD

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HF88S05

SRAM Series

December 18, 2003

12

V1.00

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

12.Application Circuit

The application circuit diagram shows one of the KB’s MCU uses two HF88S05 as expansion RAMs.

Please note that the SDO pin of the first device drive SDI pin of the second device and only one device

select pin DEV1 is used to select between one of the two devices. The P_Sn pins are tied to ground

operate at serial mode.

LCD Panel

LCDPANEL

Phone Interface

PHONE

AVDD

AVDD

AVDD

VDD

VDD

VDD

VDD

AGND

AGND

AGND

VDD

VDD

OPO

RNGDET

OPIP

OPIN

P177

P176

P175

P174

P173

P172

P171

P170

COM0

P157

COM1

P156

COM2

P155

COM3

P154

COM4

COM5

COM6

COM7

F1

FUSE

250V/0.25A

RV1

250V

D1

1N4148

2

1

D2

1N4148

2

1

R1

470K

J1

RJ11C

4

D3

1N4004

D4

1N4004

D5

1N4004

D6

1N4004

L1

100uH

L2

100uH

D7

1N4148

2

1

D8

1N4148

2

1

D9

1N4148

2

1

R2

33K

C5

104/250V

R9

430K

C2

104

D10

1N4148

2

1

D11

1N4148

2

1

D12

1N4148

2

1

D13

1N4148

2

1

D14

1N4148

2

1

D15

1N4148

2

1

D16

1N4148

2

1

R3

560K

R4

560K

R5

560K

R6

560K

R7

560K

C13

104

K1

K2

K3

K4

K5

K6

K7

K8

K9

K10

K11

K12

K13

K14

K15

K16

K17

K18

K19

K20

K21

K22

K23

K24

K25

K26

K27

K28

K29

K30

K31

K32

K33

K34

K35

C3

33p

C4

33p

Y1

32768

C6

104/250V

C7

472/250V

C8

472/250V

C11

103

C12

104

R10

430K

R11

34K

C10

0.22uF

R14

270K

R18

100K

R12

34K

C16

104

C9

104

R13

53.6K

R15

464K

C1

0.22uF

R8

270K

R17

60K

C17

104

C18

104

C19

104

U1

KB88A42

57

52

53

54

56

60

45

46

47

48

49

50

51

15

14

6

16

11

12

13

58

5

7

8

9

10

1

2

3

4

61

62

63

64

65

59

55

LV2

COM0

LC1

LC2

LV1

GND

COM7

COM6

COM5

COM4

COM3

COM2

COM1

S29/P155

S30/P156

S38/P176

S28/P154

S33/P171

S32/P170

S31/P157

LV3

S39/P177

S37/P175

S36/P174

S35/P173

S34/P172

CAP1

CAP2

RNGDI

RNGRC

OPIN

OPIP

OPO

FXO

FXI

LV4

LVF

HF88S05

C15

18p

C14

18p

Y2

3579545Hz

R16

60.4K

HF88S05