HT56R22/HT56R23/HT56R24/HT56R25/HT56R26
Pin Name
Function
PB1
PB1/SCS0/SCOM1
SCS0
SCOM1
PB2
PB2/PCLK/SCOM2
PCLK
SCOM2
PB3
PB3/PINT/SCOM3
PINT
SCOM3
PB4
PB4/BZ
BZ
PB5
PB5/BZ
/AUD
BZ
AUD
PC0
PC0/OSC1
OSC1
PC1
PC1/OSC2
OSC2
PC2
PC2/XT1
XT1
PC3
PC3/XT2
XT2
PC7
PC7/RES
RES
PD0
PWM0
PD0/PWM0/SDI0/SDA
SDI0
CO
PDPU
PINMAP
CO
SIMCTL0
CO
SIMCTL0
PDPU
PINMAP
CO
SIMCTL0
PDPU
PINMAP
CO
SPICTL0
¾
¾
ST
ST
¾
ST
CO
PCPU
CO
PCPU
CO
PCPU
CO
PCPU
AN
ST
¾
ST
¾
ST
¾
ST
CO
PBPU
CO
CO
DACTRL
PCPU
ST
OPT
PBPU
CO
SIMCTL0
SCOMC
PBPU
CO
SIMCTL0
SCOMC
PBPU
¾
SCOMC
PBPU
I/T
ST
ST
¾
ST
¾
¾
ST
ST
¾
ST
¾
ST
¾
O/T
CMOS
CMOS
SCOM
CMOS
CMOS
SCOM
CMOS
¾
SCOM
CMOS
¾
CMOS
¾
AO
CMOS
¾
CMOS
CMOS
CMOS
CMOS
CMOS
LXT
NMOS
¾
CMOS
CMOS
¾
Description
General purpose I/O. Register enabled pull-up.
SPI0 select control pin
Software controlled 1/2 bias LCD COM
General purpose I/O. Register enabled pull-up.
Peripheral clock output
Software controlled 1/2 bias LCD COM
General purpose I/O. Register enabled pull-up.
Peripheral interrupt input, falling edge trigger
Software controlled 1/2 bias LCD COM
General purpose I/O. Register enabled pull-up.
Buzzer output
General purpose I/O. Register enabled pull-up.
Buzzer bar output
Audio output
General purpose I/O. Register enabled pull-up.
Oscillator pin
General purpose I/O. Register enabled pull-up.
Oscillator pin
General purpose I/O. Register enabled pull-up.
Oscillator pin
General purpose I/O. Register enabled pull-up.
Oscillator pin
General purpose I/O. Register enabled pull-up.
Reset input
General purpose I/O. Register enabled pull-up.
PWM0 output
SPI0 serial data input
2
I C data input or output
SDA
PD1
PD1/PWM1/SDO0
PWM1
SDO0
PD2
PD2/PWM2
/SCS1
PWM2
SCS1
VDD
VSS
VDD
VSS
ST
ST
¾
¾
ST
¾
ST
PWR
PWR
OD
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
¾
¾
General purpose I/O. Register enabled pull-up.
PWM1 output
SPI0 serial data output
General purpose I/O. Register enabled pull-up.
PWM2 output
SPI1 chip select pin
Power supply
Ground
Rev. 1.00
6
March 11, 2010
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
