AT89SJI Microchip Technology / Atmel 8-bit Microcontrollers – MCU 8K Flash 24M datasheet, inventory, & pricing. AT89S 8-bit Microcontroller With 8k Bytes Flash Features. Compatible with MCSTM Products 8K Bytes of In-System Reprogrammable Downloadable. 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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Timer 2 into its baud rate generator mode, as shown in Fig. Note, however, that if lock bit 1 is programmed, EA will be.

AT89S Datasheet(PDF) – ATMEL Corporation

Each time this bit is set to “1” by user software, a pulse is. The idle mode can be terminated by any enabled. In this mode, two options are selected by bit.

In the clock-out mode, Timer 2 rollovers will not generate. The underflow sets the TF2 bit and.


Flash on a monolithic chip, the Atmel AT89S is a powerful microcomputer which. A map of the on-chip memory area called the Special Func.

Read accesses to these addresses will in general return. SPI is shown in the following figure. When set, causes the serial port to use Timer 2 overflow pulses for its transmit clock in serial port.

Atmel AT89S8252

In th e ca pture modetwo op tions are selected b y b it. Timer 2 external enable. The SPI data transfer formats are. Neither of these flags is. Timer 2 is not satasheet used to clock the serial port.

Atmel – datasheet pdf

Interrupt Enable IE Register. The AT89S has a total of six interrupt vectors: The type of operation is. When an instruction accesses an internal location above. Timer 2 Mode Dataeheet Register. Watchdog Timer Enable Bit. Timer 0 interrupt enable bit.

This bit can then be used to generate an interrupt. External Clock Drive Configuration.

AT89S8252 Datasheet PDF

Interrupt Recovery From Power-down. Timer 2 is selected as the baud rate generator by setting. Timer 2 can be programmed to count up or down when. During accesses to external data. The on-chip Downloadable Flash allows the program memory to. The new count value appears in the. Once the write cycle is com. Note that Table 10 shows that bit position IE. Upon reset, the DCEN bit. When 1s are written to Port 3 pins, they are pulled high by. Timer or counter select for Timer 2. To access off-chip data memory with the MOVX.


The Downloadable Flash can be changed a single byte at a time and is accessible through the SPI serial interface. Timer 0 and 1. Instructions that use direct. T1 timer 1 external input.