Touch Clock -- BS82D20A-3

Touch Clock
BS82D20A-3
Touch Key
Flash MCU
Characteristics
 Touch Key Flash MCU : BS82D20A-3 28SOP
 Operating voltage : 2.7V~5.5V
 20 touch key functions / Flash Program Memory : 8K16
 RAM Data Memory : 7688 / EEPROM Memory : 648
2
 I C and UART interfaces
 Low voltage reset function
 LED driver with 4 current options
 R-type LCD (SCOM)
 Timer module  2 (CTM / PTM)
 Minimal number of external components
Futaba – TK Glass Panel
Application Areas
Electronic Clock Products, LED / LCD Clock, etc.
Application Circuit
A
1
2
3
4
5
COM1
SEG_E
SEG_D
SEG_C
COM1
COM
E
D
C
COM
=
G
F
DP
A
C
B
F
B
G
E
A
SEG_G
SEG_F
SEG_DP
SEG_A
SEG_B
10
9
8
7
6
1
2
3
4
5
COM2
SEG_E
SEG_D
SEG_C
COM2
COM
E
D
C
COM
F
=
G
B
F
DP
A
C
B
G
E
D
10
9
8
7
6
SEG_G
SEG_F
SEG_DP
SEG_A
SEG_B
R1
R2
R3
R4
R5
R6
R7
R8
330Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
120Ω
SEG_G
SEG_F
SEG_DP
SEG_A
SEG_B
10
9
8
7
6
SEG_G
SEG_F
SEG_DP
SEG_A
SEG_B
DP
A
PA2_COM4 1
2
SEG_E
3
SEG_D
4
SEG_C
PA2_COM4 5
COM
E
D
C
COM
F
=
G
F
DP
A
C
B
B
G
E
D
DP
DISP3
SEGDOT
SEGG
SEGF
SEGE
SEGD
SEGC
SEGB
SEGA
10
9
8
7
6
DISP2
A
COM
E
D
C
COM
E
D
DISP1
PA0_COM3 1
2
SEG_E
3
SEG_D
4
SEG_C
PA0_COM3 5
=
B
G
DP
D
G
F
DP
A
C
B
F
DP
DISP4
SEG8_DOT
SEG_G
SEG_F
SEG_E
SEG_D
SEG_C
SEG_B
SEG_A
SEG8_DOT
COM2
SEG8_DOT
PA0_COM3
LED1
SEG8_DOT
LED2
PA2_COM4
LED3
P1
PA0_COM3
PA2_COM4
PA7
S3
1
2
3
4
5
VCC
S2
1
R10
X1
R9
5MΩ
104
R11
BZ
1
32768
1
3
2
9V
U2
J1
BT1
2
C4
Vin
Vout
1
104
HT7550(SOT89)
GND
47uF
PAD1
-
Q1
KTC8550S
8p
VIN
C3
+
KEY7
KEY6
KEY5
KEY4
KEY3
KEY2
KEY1
C2
0Ω
100Ω
OSC1
12V
2
2
CP1
BZ1
VCC
VCC
3
C5
10uF
S5
GND
9
S7
8
S6
7
S5
6
S4
5
S3
4
S2
3
S1
2
GND
1
10p
OSC2
VCC
S6
S1
Header 5
C1
S7
S4
C6
104
SEGA
SEGB
SEGC
SEGD
SEGE
SEGF
SEGG
KEY7
KEY6
KEY5
KEY4
KEY3
KEY2
KEY1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
U1
PB0/SEG0/KEY1
PB1/SEG1/KEY2
PB2/SEG2/KEY3
PB3/SEG3/KEY4
PB4/SEG4/KEY5
PB5/SEG5/KEY6
PB6/SEG6/KEY7
PB7/SEG7/KEY8
PD3/SEG19/KEY9
PD2/SEG18/KEY10
PC0/SEG8/KEY11
PC1/SEG9/KEY12
PC2/SEG10/KEY13
PC3/SEG11/KEY14
BS82D20A-3
PA3/SDA/RX
PA0/TCK1/COM2
PA2/COM3
PA7/SCL/TX/RES
VDD
PD1/TP0_0/SEG17/XT2
PD0/TP1_0/SEG16/XT1
VSS
PA1/COM0/KEY20
PA4/INT/TCK0/COM1/KEY19
PC7/TP0_1/SSEG15/KEY18
PC6/TP1_1/SSEG14/KEY17
PC5/SEG13/KEY16
PC4/SEG12/KEY15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PA3
PA0_COM3
PA2_COM4
PA7
OSC2
OSC1
COM1
COM2
BZ
PC6
PC5
SEGDOT
VCC