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W78E858A Fully static design 8-bit CMOS micro-controller up to 40 MHz 32K bytes of in-system programmable FLASH EPROM for Application Program (APROM) 4K bytes of auxiliary FLASH EPROM for Loader Program (LDROM) Low standby current at full supply voltage 256 + 512 bytes of on-chip RAM 128 bytes on-chip EEPROM memory 64K bytes program memory address space and 64K bytes data memory address space Four 8-bit bi-directional ports One 4-bit bi-directional port Extra interrupts INT2 to INT9 at PORT1 Wake-up via external interrupts INT0  INT9 Three 16-bit timer/counters One full duplex serial port Fourteen-sources, two-level interrupt capability Programmable Timer2 clock output via P1.0 17-bits watchdog timer Four channels 8-bit PWM Built-in power management Code protection 威凯特科技（香港）有限公司是nuvoton芯唐电子（原Winbond单片机）、ISOCOM、Silicon　IMAGE授权代理商，同时又是一家专业分销世界名牌电子元器件及技术开发的科技公司。