Holtek HT45F23A Manual page 12

Pin Name Function
PB4
AN1
PB4/AN1/AUD/PCK
AUD
PCK
PB5
PB5/AN2/PINT AN2
PINT
PB6
PB6/AN3/RES AN3
RES
PB7 PB7
PC0
PC0/AN4/OSC2 AN4
OSC2
PC1
PC1/AN5/OSC1 AN5
OSC1
PC2
PC2/XT1
XT1
PC3
PC3/XT2
XT2
PC4
VREF
PC4/VREF/VCAP/
SCOM1
VCAP
SCOM1
PC5
PWM0
PC5/PWM0/C1N/
SCOM2
C1N
SCOM2
PC6
PWM1
PC6/PWM1/C2P/
SCOM3
C2P
SCOM3
PC7 PC7
PD0
PD0/AN6
AN6
PD1
PD1/AN7
AN7
VDD VDD
VSS VSS
Note: I/T: Input type;
OPT: Optional by configuration option (CO) or register option
PWR: Power;
ST: Schmitt Trigger input;
CMOS: CMOS output;
HXT: High frequency crystal oscillator;
OPAI: Operational Amplifier input;
CMPI: Comparator input;
PB7,PC7,PD0/AN6 and PD1/AN7 lines, for the HT45F24A only
Rev. 1.40
TinyPower Flash MCU with OPA & Comparators
TM
OPT I/T O/T
PBPU ST CMOS General purpose I/O. Register enabled pull-up
ADCR AN CMOS A/D channel 1
DACTRL — — D/A output pin
— — CMOS Peripheral clock output
PBPU ST CMOS General purpose I/O. Register enabled pull-up
ADCR AN — A/D channel 2
— ST — Peripheral interrupt
PBPU ST CMOS General purpose I/O. Register enabled pull-up
ADCR AN — A/D channel 3
CO ST — Reset pin
PBPU ST CMOS General purpose I/O. Register enabled pull-up
PCPU ST CMOS General purpose I/O. Register enabled pull-up
ADCR AN — A/D channel 4
CO — HXT HXT pin
PCPU ST CMOS General purpose I/O. Register enabled pull-up
ADCR AN — A/D channel 5
CO HXT — HXT/ERC pin
PCPU ST CMOS General purpose I/O. Register enabled pull-up
CO LXT — LXT pin
PCPU ST CMOS General purpose I/O. Register enabled pull-up
CO — LXT LXT pin
PCPU ST CMOS General purpose I/O. Register enabled pull-up
ACSR AN — ADC reference input
LDOC — — LDO output capacitor pin. Connect a 0.1µF capacitor
LCDC — SCOM Software controlled 1/2 bias LCD COM
PCPU ST CMOS General purpose I/O. Register enabled pull-up
BPCTL — CMOS PWM0 output pin
CMP1C1 CMPI — Comparator 1 inverting input pin
LCDC — SCOM Software controlled 1/2 bias LCD COM
PCPU ST CMOS General purpose I/O. Register enabled pull-up
BPCTL — CMOS PWM1 output pin
CMP2C1 CMPI — Comparator 2 non-inverting input pin
LCDC — SCOM Software controlled 1/2 bias LCD COM
PCPU ST CMOS General purpose I/O. Register enabled pull-up
PDPU ST CMOS General purpose I/O. Register enabled pull-up
ADCR AN — A/D channel 6
PDPU ST CMOS General purpose I/O. Register enabled pull-up
ADCR AN — A/D channel 7
— PWR — Power supply
— PWR — Ground
O/T: Output type
CO: Configuration option
DAO: D/A output
SCOM: Software controlled LCD COM
LXT: Low frequency crystal oscillator
OPAO: Operational Amplifier output
CMPO: Comparator output;
12
HT45F23A/HT45F24A
Description
AN: Analog input
March 29, 2019