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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Security level 2 and 3 should only be programmed after Flash verification.

Do not try to set this bit. VIH min changed from 0. This page, called “Extra Flash Memory”, is not in the internal Flash program memory addressing space. Tell us about satasheet. Remember, the PCA timer is the time base for all modules; changing the time base for other modules would not be a good idea.

Do not set this bit 6 – Reserved The value read from this bit is indeterminate. Page 76 Table Set to select 12 clock periods per peripheral clock cycle. Page 32 It is possible to use Timer 2 as a baud rate generator and a clock generator simultaneously.

Note that one ALE pulse is skipped during each access to external data memory. Page Port 0: Save and disable interrupts.

Page 66 Figure This bit is set by hardware when a transfer has been completed. Page 78 Table Once the internal supply after the voltage regulator reach a safety level, the power monitor then looks at the XTAL clock input. Set to program PCA to be gated off during idle. From level 0, one can write level 1 or level 2. Set to enable all interrupts.

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It is based on 8 inputs with programmable interrupt capability on both high or low level. Don’t see a manual you are looking for? Do not set this bit 5 – Reserved The value read from this bit is indeterminate. The command “Program Software Security Bit” can only write a higher priority level. S2 0 0 0 0 1 1 1 1 S1 S0Selected Time-out 00 – 1 machine cycles, To communicate with slave A only, the master must send an address where bit 0 is clear e. Your manual failed to upload Page 10 NIC P2. Page 98 Figure A warm start reset occurs while VCC is still applied to the device and could be generated for example by an exit from power-down.

This is achieved by applying an internal reset to them. Page 58 Table Timer 2 operation is similar to Timer 0 and Timer 1. Must be cleared by software.

AT89C51ED2 – Microcontrollers and Processors – Microcontrollers and Processors

Set to enable a high level detection on Port line 7. There are three levels of security: It is obvious that only one Master SS high level can drive the network.

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In this mode, program execution halts. All other vectors addresses are the same as standard C52 devices. This is possible because when the port outputs a logic high, it is weakly driven, allowing an external device to pull the pin low.

AT89C51ED2

Only one Master SPI device can initiate transmissions. These API are executed by the bootloader. The status of the Port pins during Power-Down mode is detailed in Table During the time that execution resumes, the internal RAM cannot be accessed; however, it is possible for the Port pins to be accessed. Set to enable timer 2 overflow interrupt. Page 74 Table Set by hardware to indicate that the SS pin is at inappropriate logic level. The other characters, depending on their positions, stand for the name of a signal or the logical status of that signal.

Page 6 Table Nevertheless, during internal code execution, ALE signal is still generated. Do not set this bit. The external CEX input for the module on port 1 is sampled for a transition.

Set to enable a high level detection on Port line 6. Page 38 Table Page Table By default, Standard mode is active.