BS2824 Holtek Semiconductor Inc., BS2824 Datasheet - Page 6

• Manufacturer Part Number: BS2824
• Description: Touch Key Mcu
• Manufacturer: Holtek Semiconductor Inc.

BS2824/BS2854/BS2868
Touch Key MCU
Rev. 1.00
PA4/TC1/PWM0
PB0/SCOM0
PB1/SCOM1
BS2868
PA5/OSC2
PA6/OSC1
Pin Name
PA1/PFD
PA7/RES
PA2/TC0
PA3/INT
Note:
PA0
I/T: Input type
O/T: Output type
OPT: Optional by configuration option (CO) or register option
CO: Configuration Option
PWR: Power
ST: Schmitt Trigger input
CMOS: CMOS output
NMOS: NMOS output
SP: Special input
SCOM: Software controlled LCD COM
HXT: High frequency crystal oscillator
LXT: Low frequency crystal oscillator
The important point to note here is that the PB4 and PB5 pads will not be bounded to pins in the
24-pin SOP or 28-pin SOP package.
These two pads default to an input state, the designer should set the register PBPU to pull high
options. In this way, these two internal pads can be pulled up in order to prevent input pin floating
power consumption
Function
SCOM0
SCOM1
PWM0
OSC2
OSC1
RES
PA0
PA1
PFD
PA2
TC0
PA3
PA4
TC1
PA5
PA6
PA7
PB0
PB1
INT
SCOMC
SCOMC
CTRL0
CTRL0
PAWK
PAWK
PAWK
PAWK
PAWK
PAWK
PAWK
PAWK
PAPU
PAPU
PAPU
PAPU
PAPU
PAPU
PAPU
PBPU
PBPU
OPT
CO
CO
CO
OSC
I/T
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
ST
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS PFD output
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS PWM output
CMOS General purpose I/O. Register enabled pull-up and wake-up.
CMOS General purpose I/O. Register enabled pull-up and wake-up.
NMOS General purpose I/O. Register enabled wake-up.
CMOS General purpose I/O. Register enabled pull-up.
SCOM Software controlled 1/2 bias LCD COM
CMOS General purpose I/O. Register enabled pull-up.
SCOM Software controlled 1/2 bias LCD COM
OSC
O/T
6
External Timer 0 clock input
External interrupt input
External Timer 1 clock input
Oscillator pin
Oscillator pin
Reset input
Description
January 27, 2010