1. Features

 8bits micro-controller with Pipe-line structured 8051 compatible instruction set

 Flash ROM: 4K/8K Bytes

 RAM: internal 256 Bytes, external 256 Bytes

 EEPROM-like: 512 Bytes

 Operation Voltage:

fOSC = 30kHz - 16.6MHz, VDD = 2.8V - 5.5V

 Oscillator (code option)

- Crystal oscillator: 32.768kHz

- Crystal oscillator: 4MHz - 16.6MHz

- Ceramic oscillator:2MHz - 16.6MHz

- Internal RC: 16.6MHz (±2)

- External clock: 30kHz - 16.6MHz

 14/18 CMOS bi-directional I/O pins

 5/7 sink ability large mode pins

 Three 16-bit timer/counters T0, T1and T2

 Powerful interrupt sources:

- Timer0, 1, 2

- INT0, 1, 2

- ADC, EUART, SCM, PWM, LPD,CMP

 One 8-bit PWM

 Built-in comparator

 EUART

 Low voltage detect (LPD)

 6/8 channels 10-bits Analog Digital Converter (ADC), with comparator function built-in

 Low Voltage Reset (LVR) function (enabled by code option)

- LVR voltage level 1: 4.1V

- LVR voltage level 2: 3.7V

- LVR voltage level 3: 2.8V

 CPU Machine cycle: 1 oscillator clock

 Watch Dog Timer (WDT)

 Warm-up Timer

 System Clock Monitor (SCM)

 Support Low power operation modes

- Idle Mode

- Power-Down Mode

 Low power consumption

 Flash Type

 Package:

- SH88F2051B: DIP/SOP/TSSOP20Pin

SOP16 Pin

- SH88F4051B: TSSOP20Pin