Block Diagram; Pin Assignment; Acc�M�Lato� - Acc; P�Og�Am Co�Nte� Low Registe� - Pcl - Holtek BS82B12A-3 Manual

Block Diagram

Flash/EEPROM
P�og�amming Ci�c�it��
(ICP/OCDS)
EEPROM Flash
Data P�og�am
Memo�� Memo��
2
I/O I C
Note: The LXT oscillator is only for the BS82C16A-3 and BS82D20A-3.

Pin Assignment

PB0/SSEG0/KEY1
PB1/SSEG1/KEY2
PB2/SSEG2/KEY�
PB�/SSEG�/KEY4
PB4/SSEG4/KEY�
PB�/SSEG�/KEY6
PC0/SSEG8/KEY9
PC1/SSEG9/KEY10
PC2/SSEG10/KEY11
PC�/SSEG11/KEY12
PB0/SSEG0/KEY1
PB1/SSEG1/KEY2
PB2/SSEG2/KEY�
PB�/SSEG�/KEY4
PB4/SSEG4/KEY�
PB�/SSEG�/KEY6
PB6/SSEG6/KEY7
PB7/SSEG7/KEY8
PC0/SSEG8/KEY9
PC1/SSEG9/KEY10
PC2/SSEG10/KEY11
PC�/SSEG11/KEY12
Rev. 1.20
BS82B12A-3/BS82C16A-3/BS82D20A-3
Touch Key 8-Bit Flash MCU with LED/LCD Driver
Low
Voltage
Detect
Watchdog
Time�
Low
Voltage
Reset
RAM
Time
Data
Bases
Memo��
Time�
UART
Mod�les
PA�/SDA/RX
1 20
PA0/TCK1/SCOM2/ICPDA/OCDSDA
2 19
PA2/SCOM�/ICPCK/OCDSCK
� 18
PA7/SCL/TX
4 17
VDD
� 16
VSS
6 1�
PA1/SCOM0
7 14
PA4/INT/TCK0/SCOM1
1�
8
PC�/TP0_0/SSEG1�
9 12
PC4/TP1_0/SSEG12
10 11
BS82B12A-3/BS82BV12A-3
20 SOP-A
1 PA�/SDA/RX
24
2
PA0/TCK1/SCOM2/ICPDA/OCDSDA
2�
� PA2/SCOM�/ICPCK/OCDSCK
22
4 PA7/SCL/TX
21
�
VDD
20
6 VSS
19
7 PA1/SCOM0
18
8
PA4/INT/TCK0/SCOM1
17
9 PC7/TP0_1/SSEG1�
16
10 PC6/TP1_1/SSEG14
1�
11 PC�/TP0_0/SSEG1�
14
12 PC4/TP1_0/SSEG12
1�
BS82B12A-3/BS82BV12A-3
24 SOP-A
8
Reset
Ci�c�it
8-bit
Inte���pt
RISC
Cont�olle�
MCU
Co�e
LXT
Oscillato�
HIRC/LIRC
Oscillato�s
LED D�ive�
LCD D�ive�
To�ch Ke�s
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