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0 – July. 1. Qualification Package. AT89C51ED2. FLASH 8-bit C51 Microcontroller. 64 Kbytes FLASH, 2 Kbytes EEPROM. AT89C51RD2 / AT89C51ED2. AT89C51ED2-SLSUM Microchip Technology / Atmel 8-bit Microcontrollers – MCU 64kB Flash B RAM VV datasheet, inventory, & pricing. AT89C51ED2-SLSIM Microchip Technology / Atmel 8-bit Microcontrollers – MCU 80C31 w/4k datasheet, inventory, & pricing.

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The second option is also not recommended if other PCA modules are being used. Your manual failed to upload If the program counter ever goes astray, a match will eventually occur and cause an internal reset.

It is driven by the Master for eight clock cycles which allows to exchange one Byte on the serial lines. Page 42 Table When the pin is pulled low, it is driven strongly and able to sink a fairly large current.

Pins are not guaranteed to sink current greater than the listed test conditions. Set by hardware when an invalid stop bit is detected.

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Symbol Description Symbol T Table Set to enable timer 2 overflow interrupt. Save and disable interrupts. Or point us to the URL where the manual is located.


The four segments are: Timer 2 operation is similar to Timer 0 and Timer 1. MODF is set to warn that there may be a multimaster conflict for system control. Don’t see a manual you are looking for?

Page 32 It is possible to use Timer 2 as a baud rate generator and a clock generator simultaneously. Page 56 Table Set to configure the SPI as a Master. The Kbytes Flash memory can be programmed either in parallel mode or in serial mode with the ISP capability or with software.


In this mode, program execution halts. Page 90 Figure Page 38 Table Page 34 Table These inputs are available as alternate function of P1 and allow to exit from idle and power-down modes.

Set by hardware when VCC rises from 0 to its nominal voltage. Datasheet can be useful if external peripherals datwsheet mapped at addresses already used by the internal XRAM. Its advantages include reduced software overhead and improved accuracy.

The WDT is by default disabled from exiting reset. Page 18 Figure Page 46 Figure These API are executed by the bootloader. Note that one ALE pulse is skipped during each access to external data memory. There are three levels of security: Page 66 Figure This is achieved by applying an internal reset to them. Can also be set by software. Output pulse for latching the low byte of the address during an access to external memory. Only one Master SPI device can initiate transmissions.


Page 74 Table It is based on 8 inputs with programmable interrupt capability on both high or low level. Can not be set or cleared by software. A cold start reset is the one induced by VCC switch-on.

Power-Down mode stops the oscillator, freezes all clock at known states. It contains 64K bytes of program memory organized respectively in pages of bytes. It is possible to use Timer 2 as a baud rate generator and a clock generator simultaneously.

Page 78 Table