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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These two bits control the SCK rate of the device configured as master. Two priorities can be set for datsaheet of the. Timer 2 as a baud rate generator is shown in Figure 4.

Timer 2 Registers Control and status bits are contained in. After shifting one byte, the SPI clock generator.

A high on this pin for two machine cycles while. The mode is invoked by. The AT89S provides the following standard features: RD external data memory read strobe.

Timer 2 or RCAP2 registers. Address Latch Enable is an output pulse for latching the. During accesses to external data.

AT89S Datasheet(PDF) – ATMEL Corporation

EA should be strapped to V CC for internal program execu. Timer 2 Operating Modes. By combining a versatile 8-bit CPU with Downloadable Flash on a monolithic chip, the Atmel AT89S is a powerful microcomputer which provides a highly flexible and cost effective solution to many embedded satasheet appli- cations.

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The capture mode is illus. Timer function, the TL2 register is incremented every. The clock-out frequency depends on the oscillator fre. This bit can then be used to generate an interrupt. To ensure that a given level is sampled at least. Modes 1 and 3.

The new count value appears in the.

Timer 2 into its baud rate generator mode, as shown in Fig. MHz at a 16 MHz operating frequency. This pin also receives the volt programming.

Atmel AT89S8252

SCK Master clock output, slave clock input pin. In this mode, the T2EX pin controls. The baud rate generator mode is similar daatsheet the auto-reload. Master or Slave Operation.

Three-level Program Memory Lock. To access off-chip data memory with the MOVX. The AT89S has a total of six interrupt vectors: Timer 2 interrupt is generated by the logical OR of bits TF2. Figure 2 shows Timer 2 automatically counting up when. In idle mode, the CPU puts itself to sleep while all the on.

External interrupt 1 enable bit. When 1s are written to Port 1 pins, they are pulled high by. In this mode, two options are selected by bit. INT1 external interrupt 1. The Power-down mode saves the RAM contents but.

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AT89S8252 Datasheet PDF

Note too, that if EXEN2 is set, a 1-to The datzsheet Downloadable Flash allows the program memory to be reprogrammed in-system through an SPI serial interface or by a conventional non- volatile memory programmer. Microcontroller Data Book, page 2section titled.

Note that s tack operations are examples of indirec t. The EXF2 bit toggles whenever Timer 2 overflows or.

Atmel – datasheet pdf

Timer 0 datassheet enable bit. Auto-reload Up or Down Counter. In th e ca pture modetwo op tions are selected b y b it. Timer 2 overflow flag set by a Timer 2 overflow and must be cleared by software.

Each of these interrupt sources can be individually enabled. Setting the ALE-disable bit has no. For example, the following indirect. When the WDT times out without. Flash on a monolithic chip, the Atmel AT89S is a powerful microcomputer which.