台湾远翔（飞凌）FM8PE/PS56单片机

˙Only 42 single word instructions

˙5-level deep hardware stack Device Pins # I/O # EPROM/ROM (Byte) RAM (Byte) FM8PS54/S54E 18 16 512 49 FM8PS56/S56E 18 16 1K 49 ˙8-bit real time clock/counter with 8-bit programmable

prescaler

˙On chip Watchdog Timer (WDT) with

internal oscillator for reliable operation and soft-ware watch-dog

enable/disable control

˙2 I/O ports with

independent direction control

˙Soft-ware I/O

pull-high/pull-down or open-drain control

˙1

internal interrupt source; 2 external interrupt source

˙Wake-up from SLEEP mode

˙Built-in 8MHz, 4MHz, 1MHz, and 455KHz internal RC

oscillator