SM1620B

SM1620B IC

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SM1620B

SM1620B LED

MCU

LED

SOP20 CMOS

VDD 3.3V-5.0V

4976

61

8

CLKSTBDI/O

RC

ESD HBM>8KV

SOP20

VCD/DVD/DVB

LED

GOSTON ELECTRONICS CO.,LTD v1.5

400-033-6518 www.linkage66.com [email protected]

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DI/O

CLK

STB

/

KEY2

VDD

GND

SEG1

SEG6

SEG12/GRID7

SEG14/GRID5

SEG13/GRID6

GRID4

GRID1

DI/O / 2

CLK 3

STB

4 STB

STBCLK

KEY2 5

SEG1/KS1SEG6/KS6 712 P

SEG12/GRID7SEG14/GRID5 / 1315 /

VDD 6 5V10%

GRID3GRID4 1617 N

GND 1,18

GRID1GRID2 1920 N

SM1620B IC



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Ta = 25

VDD -0.5+7.0 V

VCLK,VSTB,VDI/O -0.5VDD + 0.5 V

LED SEG ISEG -50 mA

LED GRID IGRID 700 mA

TOPT -40+80

TSTG -65+150

Ta = 25

VDD 3.3 5.0 5.5 V

VIH 0.7VDD - VDD V

VIL 0 - 0.3VDD V

IDD VDD=5.0V - - 1.2 mA

SEG ISEG VDD=5.0VSEG 2 GND - -47 - mA

GRID IGRID VDD=5.0VGRID 2 VDD - 650 - mA

KEY RKEY KEY2 10 - 25 K

GRID fGRID VDD=5.0V - 210 - Hz

tPLZ VDD=5.0VCLKDI/O

RUP = 10 KCL=15pF

- 75 - ns

tPZL - 50 - ns

tTZH(SEG) VDD=5.0VSEGn 100

GRIDn 10CL=15pF

- 6 - ns

tTLZ(GRID) - 14 - ns

tTHZ(SEG) - 10 - ns

tTZL(GRID) - 27 - ns

fCLK(max) 50% - - 1 MHz

SM1620B IC



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VDD=5.0VTa = 25

PWCLK 500 - - ns

PWSTB 1 - - s

tSETUP 100 - - ns

tHOLD 100 - - ns

CLK STB tCLK STB CLK STB 1 - - s

*DIN DOUT PAD DI/O

SM1620B IC



- 5 -

SM1620B

SEG1

SEG2

SEG3

SEG4

SEG5

SEG6

X X X X X SEG12

SEG13

SEG14

X X

b0 b1 b2 b3 b4 b5 b6 b7 b0 b1 b2 b3 b4 b5 b6 b7

00H 01H GRID1

02H 03H GRID2

04H 05H GRID3

06H 07H GRID4

08H 09H GRID5

0AH 0BH GRID6

0CH 0DH GRID7

61bit

KEY2

SEG

1/K

S1

SEG

2/K

S2

SEG

3/K

S3

SEG

4/K

S4

SEG

5/K

S5

SEG

6/K

S6

b0 b1 b2 b3 b4 b5 b6 b7

- KEY2 - - KEY2 - - - KEY

X SEG1/KS1 X X SEG2/KS2 X X X



X X X X X X X X

X X X X X X X X

SM1620B IC



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LED STB DI/O

STB

4769 7 6

/ON

0 0 --- --- --- --- B1 B0MSB LSB

00 49

01 58

10 67

11 76

0 1 --- --- 0 B1 B0

MSB LSB

0010

01

0

SM1620B IC



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1 0 --- --- B2 B1 B0

MSB LSB

000 1/16001: 2/16010: 4/16011: 10/16100: 11/16101: 12/16110: 13/16111: 14/16

B3

0 1

1 1 0 0 B2 B1 B0B3

00H-0DH

2 3 4 5 6 7 8

b1 b2 b3 b4 b5 b6 b7

STB

CLK

DI/O

SM1620B IC



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STB

CLK 1 2 8tWAIT

1 2 3 4 5

b0 b1 b7

b0 b1 b2 b3 b4

DI/O

DI/O

1tWAIT1us

2MCU DI/O

3DI/O N

MCU CLK

MCU

1 2 3 4 5 6

GRID1

GRID2

GRID3

GRIDn

SEGn

1frame

7 8

KEYSCAN

2 frame

Command1 Commond2 Command3 Data1 Datan Command4

STB

CLK

DI/O

Command1

Command2

Command3

SM1620B IC



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Data1~n 14byets

Command4

00H-0DH 14 00H 14

01H 13 n 14-n

Command1

DATA1~n

SM1620B IC



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/***************************************************************

SM1620B

AT89C2051

Keil uVision3

12MHz

****************************************************************/

#include

#include

typedef unsigned char uchar;

//

sbit DIO =P1^7;

sbit CLK =P1^6;

sbit STB =P1^5;

//

uchar KEY[5]={0}; //

/*********************************************/

// SM1620B 8

/*********************************************/

void send_8bit(uchar dat)

{

uchar i ;

for (i=0;i>1;

}

}

/************************************************/

// SM1620B

SM1620B IC



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/***********************************************/

void command(uchar com)

{

STB=1;

_nop_();

STB=0;

send_8bit(com);

}

/*************************************************/

//

/************************************************/

void display()

{

uchar i;

command(0x03); // 7*6

command(0x40); // 1

command(0xc0 ); // 00H

for(i=0;i

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KEY[j]=KEY[j]>>1;

CLK=0;

CLK=1;

if(DIO)

KEY[j]=KEY[j]|0x80;

}

STB=1;

}

/***********************/

//

/**********************/

void main()

{

while(1)

{

display(); //

read_key(); //

{

//,

}

}

}

SM1620B IC



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SOP20

SM1620B IC



SM1620B

Documents

Transcript of SM1620B