rom (flash) : 16k bytes

sram : 1k bytes

general purpose i/o (gpio)
     - 44-pin pkg : 42
      (r0[7:0], r1[7:0], r2[7:0], r3[5:0], r4[7:0], r5[3:0])
     - 42-pin pkg : 40
      (r0[7:0], r1[7:0], r2[7:0], r3[5:0], r4[7:0], r5[1:0])
     - 32-pin pkg : 30
      (r0[7:0], r1[7:0], r2[7:0], r3[5:0])
     - 28-pin pkg : 26
      (r0[7:0], r1[7:0], r2[0], r2[7:5], r3[5:0])

basic interval timer (bit) 8bit × 1ch

watch dog timer (wdt) 8bit × 1ch

watch timer (wt)

timer/ counter 8bit × 4ch
     (or 16bit x 2ch )

sio 8bit × 1ch

uart 8bit × 1ch

i2c 8bit × 1ch

buzzer 8bit x 1ch
     244 – 250khz @8mhz

pwm 8bit x 2ch, 10bit × 3ch, 16bit x 1ch

12 bit adc * 15 ch.

interrupt sources
     - external interrupts(int0~11),
     - timer0 match/overflow
     - timer1 match/overflow
     - timer2 match/overflow
     - timer3 match/overflow
     - wdt, bit, wt, sio, uart(tx/rx), i2c

on-chip rc-oscillator 8/4/2/1mhz

power on reset (por)
     - reset release level 1.83v/typ
      (detect only rising)

low voltage reset (lvr)
     4 level detector
     (4.0v, 3.0v, 2.7v, 2.4v)

minimum instruction execution time
     166ns (@12mhz 2 cycle nop instruction)

power down mode idle

stop mode

sub-active mode system used external 32.768khz oscillation clock

operating voltage & frequency
     - 2.2v ~ 5.5v : 1.0 - 4.2 mhz
     - 2.7v ~ 5.5v : 1.0 - 8.0 mhz
     - 4.0v ~ 5.5v : 1.0 - 12.0 mhz

operating temperature - 40°c ~ 85°c

oscillator type
     - crystal
     - ceramic
     - rc

pkg type
     - 44mqfp
     - 42sdip
     - 32sdip/sop
     - 28 skdip/sop