1. Features
 8bits micro-controller with Pipe-line structured 8051 compatible instruction set
 Flash ROM: 32K Bytes (Rub/write 10000 times)
 RAM: internal RAM 256 Bytes, external 1280 Bytes, LED RAM 28 Bytes, Touch key RAM 16 Bytes
 EEPROM-like: 1024 Bytes (Rub/write 100000 times)
 Operation Voltage:
- fOSC = 2MHz - 12MHz, VDD = 2.7V - 5.5V
 Oscillator (code option):
- Crystal oscillator: 32.768kHz
- Crystal oscillator: 2MHz - 12MHz
- Ceramic oscillator: 2MHz - 12MHz
- Internal RC: 16.6MHz (TA = +25°C, ±1%), (TA = -40°C +85°C, ±2%)
- Internal RC: 128KHz (±10%)
 24pin: 22 CMOS bi-directional I/O pins
 Built-in pull-up resistor for input pin (Typical value 30K)
 Seven big current driver I/O
(7 common-cathode/common-anode LED)
 Four sink current driver I/O (P0.1 - P0.4)
 Five 16-bit timer/counters T0, T1, T2, T3, T4
 Two 12 Bit PWM
 Powerful interrupt sources:
- Timer 0, 1, 2, 3, 4
- INT40, INT45 - NT47
- INT30 - INT32
- INT2
- EUART, TWI, SCM, LPD
- PWM1, 2, TOUCH, CRC
 8 channels Touch Key input
 EUART with Baud-rate generator
 TWI
 LED driver
(7COM common-cathode/common-anode LED)
- 7 X 13 dots
 LPD
- LPD voltage: 2.8V - 4.2V
 Low Voltage Reset (LVR) function (enabled by code option)
- LVR Voltage 1: 3.7V
- LVR Voltage 2: 3.1V
- LVR Voltage 3: 2.8V
 CPU Machine cycle: 1 oscillator clock
 Watch Dog Timer (WDT)
 Warm-up Timer
 CRC verify module (CRC)
 Support Low power operation modes:
- Idle Mode
- Power-Down Mode
 Flash Type
 Package:
- SOP24
- SOP28