Touch Wheel-Key -- BS84B08A-3

Touch Wheel-Key
BS84B08A-3
Touch Key
Flash MCU
Characteristics
 Touch Key MCU: BS84B08A-3 20SSOP
8-bit Flash type MCU
 System clock: Internal RC OSC HIRC (8 / 12 / 16MHz) (software option) /
LIRC (32KHz)
 307216 Flash Program Memory
 2888 RAM Data Memory
 648 EEPROM Data Memory
 Single external interrupt input shared with an I/O line
 Watchdog timer
 8 channel 12-bit A/D converter
 6-level subroutine nesting
 SIM Serial Interface Module
 Single 8-bit Timer / Event Counter
 Single Time-Base functions for generation of fixed time interrupt signals
 8 Touch Key functions
BS84B08A-3
Application Areas
Consumer Products, Home Appliances, Industrial Control, Health Care Products, etc.
Application Circuit
U1
WHEEL_PAD
1
2
3
4
5
6
7
8
9
VSS 10
POW
F1
F2
WHEEL4
WHEEL3
WHEEL2
WHEEL1
4
3
2
1
F3
VDD
+
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4KEY_WHEEL
10uF/16V
C2
104
PB0/KEY1
PB1/KEY2
PB2/KEY3
PB3/KEY4
PB4/KEY5
PB5/KEY6
PB6/KEY7
PB7/KEY8
VSS
VDD
PA0/SDA
PA1/SDO
PA2/SCK/SCL
PA3/SCSB
PA4/INT
PA7
PD7/AN7
PD6/AN6
PD1/AN1
PD0/AN0/VREF
BS84B08A_20SSOP
20 PA0/SDI/SDA
19 PA1
18 PA2/SCK/SCL
17 PA3/SCS
16 PA4/INT
15 PA7
14
13
12
R1
11
1K
VDD
R2
47K
C3
104
R3
NTC