闪存微型控制器(pdf 23页)(英文)

CMOS single-chip 8-bit microcontroller
with FLASH EPROM program memory
PROGRAMMING MODES
The Flash Microcontrollers have two programming modes:
a. Parallel programming on a programmer, like an EPROM Microcontroller
b. ISP - In System Programming - while the Microcontroller is soldered to the board.
The parallel programming is done on a programmer like an EPROM microcontroller. The parallel programming is
faster than the ISP programming and can be done even faster on a gang programmer with some Microcontrollers
programmed at the same time.
The ISP programming is done without removing the microcontroller from the system. The programming is done by
downloading the code into the microcontroller and calling non-erasable built-in subroutines in the Micro’s ROM area.
The user can download the code by using loader subroutines located in the ROM area, or use other loader routines
written by the user and located in the Flash area.
During the ISP programming, connect pin EA to programming voltage VPP=12.25V ± 0.25V
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