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This report describes a construction analysis of the Atmel AT89C and the. AT89S 8-Bit Microcontrollers. Ten AT89C devices encapsulated in . 89S datasheet, 89S circuit, 89S data sheet: ATMEL – 8-Bit Microcontroller with 8K Bytes Flash,alldatasheet, datasheet, Datasheet search site for. This application note describes AT89S mem- ory sizes, features, and SFR mapping. More detailed information can be found in the. AT89S datasheet.

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Instructions that use direct.

(PDF) 89S8252 Datasheet download

Data Pointer Register Select. The Downloadable Flash can be changed a single byte at a time and is accessible. The new count value appears in the. While programming operations are being executed.

The EXF2 bit toggles whenever Timer 2 overflows or.

This pin is also the program pulse input PROG during. Three-level Program Memory Lock. In this application, Port 2 uses strong internal pul.


In this mode, the T2EX pin controls. The baud rate formula is given below. This pin also receives the volt programming. The RCAP2 registers may be. Timer 2 Output Enable bit. The AT89S provides datazheet following standard features: Note, however, that the baud-rate and clock-out. Note that not all of the addresses are occupied, and unoc. To ensure that a given level is sampled at least. By combining a versatile 8-bit CPU.

By combining a versatile 8-bit CPU with Downloadable. User software should not write 1s to these. This pin, besides being a regu. For example, the following direct addressing instruction. External pullups are required during program. Modes 1 and 3. It is possible to use Timer 2. The Power Down Mode saves the RAM contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hard- ware reset.

Interrupt Recovery From Power-down. The on-chip downloadable Flash allows the program mem. RD external data memory read strobe. There are no requirements on the duty cycle of the external.


When all three bits are set to “1”, the nominal period is ms. In most applications, it is configured for timer. Atmel Electronic Components Datasheet. In this mode, P0 has internal.

S5P2 of the cycle in which the timers overflow. When the WDT times out without. The SPDR is double buff.

Note, however, that if lock bit 1 is programmed, EA will be. Timer 2 Overflow Rate. WR external data memory write strobe. Port 1 pins that are externally being pulled low will source.

Flash programming and verification.

89S Datasheet(PDF) – ATMEL Corporation

The Power-down mode saves the RAM contents but. The on-chip Downloadable Flash allows the program memory to be reprogrammed in-system through an SPI serial interface or by a conventional non- volatile memory programmer. Timer 2 in Baud Rate Generator Mode.