led灯管电源ic 8bit mcu

1.1 features
z wide operating voltage range:
- four oscillator periods: 2.0 ~ 5.5v at 32khz, 2.2 ~ 5.5v at dc-8mhz, 2.6 ~ 5.5v at dc-20mhz.
- two oscillator periods: 2.0 ~ 5.5v at 32khz, 2.2 ~ 5.5v at dc-8mhz, 10mhz-16mhz, 20mhz not used.
z wide operating frequency range: 32khz ~ 20mhz.
z wide operating temperature range: -40ºc ~ 85ºc.
z rom: 1k x 14 bits.
z ram: 48 x 8 bits.
z selectable oscillator options:
- irc: internal resistor and capacitor oscillator.
- ext-r: external resistor and internal capacitor oscillator.
- erc: external resistor and capacitor oscillator.
- lf-xtal: low frequency crystal oscillator.
- xtal: crystal/resonator oscillator.
- hf-xtal: high frequency crystal/resonator oscillator.
z 6-level deep hardware stack.
z total 55 single word instructions.
z all instructions are single cycle except for program branches which are two-cycle.
z direct, indirect addressing modes for data accessing.
z all rom area lgoto instruction, all rom area subroutine lcall instruction.
z 8-bit real time clock/counter (timer0) with 8-bit programmable prescaler.
z on chip watchdog timer (wdt) with internal oscillator for reliable operation and software watchdog enable/disable control.
z internal power-on reset (por).
z built-in low voltage reset (lvr).
z power-up reset timer (pwrt) and oscillator start-up timer (ost).
z sleep mode function to reduce power consumption