Block Diagram; Pin Assignment - Holtek HT45F23A Manual

Block Diagram

Flash/EEPROM
Programming Circuitry
EEPROM Flash
Data Program
Memory Memory
PFD/Buzzer LCD
Driver Driver

Pin Assignment

V D D 1
P A 1 / C 1 O U T / T C 0 2
P A 0 / C N P / S C O M 0
3
P C 3 / X T 2
4
P C 2 / X T 1 5
P C 1 / A N 5 / O S C 1
6
P C 0 / A N 4 / O S C 2
7
P B 6 / A N 3 / R E S 8
H T 4 5 F 2 3 A
1 6 N S O P - A
P C 6 / P W M 1 / C 2 P / S C O M 3 1
2
P C 5 / P W M 0 / C 1 N / S C O M 2
P C 4 / V R E F / V C A P / S C O M 1 3
P A 0 / C N P / S C O M 0 4
5
P C 3 / X T 2
P C 2 / X T 1 6
P C 1 / A N 5 / O S C 1 7
8
P C 0 / A N 4 / O S C 2
9
P B 6 / A N 3 / R E S
P B 5 / A N 2 / P I N T 1 0
1 1
P B 4 / A N 1 / A U D / P C K
1 2
P B 3 / A N 0 / S C S
H T 4 5 F 2 3 A / H T 4 5 F 2 4 A
2 4 S S O P - A
Rev. 1.40
TinyPower Flash MCU with OPA & Comparators
TM
Watchdog Internal RC
Timer Oscillators
LDO
Low Voltage Low Voltage
Detect Reset
RAM Data
ICP
Memory
I/O SIM Timers
1 6 V S S
1 5 P A 2 / A 1 P / C 2 O U T
P A 3 / A 1 N / I N T 0
1 4
P A 4 / A 1 E / T C 1
1 3
1 2 P A 5 / A 2 P / P F D
P A 6 / A 2 N / B Z
1 1
P A 7 / A 2 E / B Z
1 0
9 P B 3 / A N 0 / S C S
P C 6 / P W M 1 / C 2 P / S C O M 3
P C 5 / P W M 0 / C 1 N / S C O M 2
P A 1 / C 1 O U T / T C 0 P C 4 / V R E F / V C A P / S C O M 1
2 4
V D D
2 3
V S S
2 2
P A 2 / A 1 P / C 2 O U T
2 1
P A 3 / A 1 N / I N T 0
2 0
P A 4 / A 1 E / T C 1
1 9
P A 5 / A 2 P / P F D
1 8
P A 6 / A 2 N / B Z
1 7
P A 7 / A 2 E / B Z
1 6
P B 0 / S D O / I N T 1
1 5
P B 1 / S D I / S D A
1 4
P B 2 / S C K / S C L
1 3
10
HT45F23A/HT45F24A
8-bit
RISC
MCU
Core
Time
Base
12-bit A/D
Converter
PWM
Generator
D/A
Converter
OPAs
Comparators
2 0
P A 1 / C 1 O U T / T C 0
1
P A 0 / C N P / S C O M 0 1 9
2
P C 3 / X T 2 1 8
3
1 7
P C 2 / X T 1
4
P C 1 / A N 5 / O S C 1 1 6
5
P C 0 / A N 4 / O S C 2 1 5
6
1 4
P B 6 / A N 3 / R E S 7
P B 4 / A N 1 / A U D / P C K 1 3
8
P B 3 / A N 0 / S C S 1 2
9
1 1
P B 2 / S C K / S C L 1 0
H T 4 5 F 2 3 A / H T 4 5 F 2 4 A
2 0 S S O P - A
1 2 8
2
2 7
3 2 6
P A 0 / C N P / S C O M 0 4 2 5
5 2 4
P C 3 / X T 2
P C 2 / X T 1 6 2 3
P C 1 / A N 5 / O S C 1 7 2 2
8 2 1
P C 0 / A N 4 / O S C 2
P B 6 / A N 3 / R E S 9 2 0
P B 5 / A N 2 / P I N T 1 0 1 9
P D 1 / A N 7 1 1 1 8
P D 0 / A N 6 1 2 1 7
P B 4 / A N 1 / A U D / P C L K 1 3 1 6
P B 3 / A N 0 / S C S 1 4 1 5
H T 4 5 F 2 4 A
2 8 S S O P - A
External
Oscillators
Reset
Circuit
Interrupt
Controller
V D D
V S S
P A 2 / A 1 P / C 2 O U T
P A 3 / A 1 N / I N T 0
P A 4 / A 1 E / T C 1
P A 5 / A 2 P / P F D
P A 6 / A 2 N / B Z
P A 7 / A 2 E / B Z
P B 0 / S D O / I N T 1
P B 1 / S D I / S D A
P A 1 / C 1 O U T / T C 0
V D D
V S S
P A 2 / A 1 P / C 2 O U T
P A 3 / A 1 N / I N T 0
P A 4 / A 1 E / T C 1
P A 5 / A 2 P / P F D
P A 6 / A 2 N / B Z
P A 7 / A 2 E / B Z
P C 7
P B 7
P B 0 / S D O / I N T 1
P B 1 / S D I / S D A
P B 2 / S C K / S C L
March 29, 2019