Samsung Understanding the TM1628 Circuit Diagram in Cooktop Key and Display Systems

Page 20

S3F84B8_ALL-IN-ONE IH COOKER_AN_REV 0.00

2 HARDWARE IMPLEMENTATION

 

 

2.6.3 KEY AND DISPLAY CIRCUIT

Figure 2-9 shows the circuit diagram for key and display.

 

 

 

5V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

2

 

 

 

 

 

 

1

R6

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

R32

 

 

 

 

U2 constant

 

 

 

 

 

constantR29

 

1

28

 

 

 

constantR8

 

 

 

 

 

NC

 

 

 

GND0

 

GRID1

 

constant

 

1

 

 

 

2

DIO

 

 

 

GRID1

27

 

 

1

 

 

 

 

 

3

CLK

 

 

 

GRID2

26

 

GRID2

 

1

 

 

 

 

 

 

4

STB

 

 

 

 

GND

25

 

GND

 

 

 

 

KEY1

 

5

 

 

 

 

24

 

GRID3

 

 

 

 

KEY 1

 

 

 

GRID3

 

 

 

 

KEY2

 

6

 

 

 

23

 

GRID4

 

 

 

 

KEY 2

 

 

 

GRID4

 

 

 

 

5V

7

 

 

 

22

 

GND

 

 

 

VDD0

 

 

 

GND1

 

 

 

 

SEG1/KS1

 

8

 

 

 

21

 

5V

 

 

 

 

SEG2/KS2

9

SEG1/KS1

 

 

 

 

VDD1

20

 

GRID5

 

 

 

 

SEG2/KS2 SEG14/GRID5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEG3/KS3

10

19

 

GRID6

 

 

 

 

SEG3/KS3 SEG13/GRID6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEG4/KS4

11

18

 

GRID7

 

 

 

 

SEG4/KS4 SEG12/GRID7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEG5/KS5

12

17

 

 

 

 

 

 

SEG5/KS5

 

 

 

SEG10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEG6/KS6

13

 

 

 

16

 

 

 

 

 

 

SEG6/KS6

 

 

 

 

SEG9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEG7/KS7

14

 

 

 

 

15

 

SEG8/KS8

 

 

 

SEG7/KS7

 

 

SEG8/KS8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TM1628

 

 

 

 

 

 

 

 

 

 

 

 

K4

 

KEY

 

K2

KEY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SEG1/KS1 1

D1

2

 

LED

SEG4/KS4 1

D2

2

 

LED

1

D3

2

 

LED

SEG3/KS3 1

D4

2

LED

D8

4LED

GRID7

SEG5/KS5 71 GRID1 SEG4/KS4 8 7 1 2 SEG6/KS6 SEG3/KS3 9 8 2 3 SEG7/KS7 SEG2/KS2 10 9 3 4 GRID2 SEG1/KS1 11 10 4 5 GRID3 GRID4 12 11 5 6 SEG8/KS8 12 6

KEY1

KEY2

1

R18 constant

2

0

1

R17

2

0

K3

KEY constant 1

R9

SEG3/KS3 2

K1

K5

K6

K7

KEY

KEY

KEY

KEY

1

1

1

1

constant

constant

constant

constant

R7

R10

R11

R12

2

2

2

2

SEG1/KS1

SEG4/KS4

SEG5/KS5

SEG6/KS6

 

5V

 

K8

+

C26

 

 

PF

 

 

GND

KEY

0

1

 

 

constant

constant

 

R14

 

 

2

 

 

SEG8/KS8

 

 

2 1

C27

PF

Figure 2-9 Key and Display Circuit

There are eight keys for power on, power grade selection, and some LEDs to display the operating status and power grade. TM1628 controls the key and display circuit. MCU communicates with TM1628 through three I/Os: DIO for data transfer, CLK as serial clock, and STB for chip enable.

2-14

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Contents S3F84B8 Important Notice Revision History Table of Contents List of Figures List of Tables Induction Cooking Principle HOW Induction Cooking WorksKEY Features of S3F84B8 S3F84B8Protection System PrincipleHeating System Diagram and PIN Assignment Hardware ImplementationVSS Power Supply 220 VACSynchronization Circuit CookerWaveform of the Synchronization Circuit Power Control Voltage MeasurementCurrent Measurement Current Measurement CircuitSystem Protection Surge ProtectionIgbt Over Voltage Protection OVER/UNDER Voltage ProtectionTemperature Protection Shows the circuit diagram for temperature protectionBuzzer and FAN Control Other FunctionsPAN Detection Shows the circuit diagram for key and display KEY and Display CircuitState Transition Diagram Software ImplementationSoftware Diagram Shows the software diagramInterrupt Service Routine Diagram Internal Resource Arrangement and Configuration OPASource Code Error CodeSchmatic