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HALT mode wake up source: RTC timer overflow or PA0~3, PB0~3, PD0~3 and PC0 edge trigger.
Provided 12 input /output pins: each I/O has bit programmable as input or output port, these 12 I/Os also provided edge trigger wake up function and pull up resistors config ured by registers.
(a) They are provided with high sink current 20mA @VDD=3V, VOL=0.5V.
(b) They are provided with driv e current 7mA @VDD=3V, VOH=2.5V.
(c) Pull up 150k ohm resistor.
Provided 1 input pin (PA3), shared with RESETB/VPP pin by option, pull up 150k ohm resistor and edge
trigger wake up function.
Built-in one IR LED drive pin.
Provided RTC with 32K X’tal oscillator for real time clock applications.
Oscillator type by option
(a) External X’tal oscillator 1MHz~4MHz or 32KHz (e xternal ceramic resonator or crystal oscillator, the pin of X’tal is shared with PB0 and PB1 pin )
(b) Built-in internal RC OSC 32 MHz ---- frequency deviation within ±2%, VDD=1.8V~3.6V, temp= -20 ºC ~70 ºC Four reset condition Low voltage reset (LVR=1.55V)
Power on RC-reset
External reset (RSTB) pin shared with PA3 by option.
Watch dog timer overflow reset (WDT period is 0.131 Sec~1.048 Sec, if MCU run at 4MIPS)