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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Atmel – datasheet pdf

Instructions that use direct. Address Latch Enable is an output pulse for latching the. User software should never write 1s to unimplemented bits, because. This pin, besides being a regu.

The user should always initialize the DPS bit to the. Note that not all of the addresses are occupied, and unoc. T0 timer 0 external input.

The content of the on-chip RAM and all the spe. Timer function, the TL2 register is incremented every.

When 1s are written to Port 2 pins, they are pulled high by. Timer 2 has three operating modes: In this mode, two options catasheet selected by bit. The interconnection between master and slave CPUs with. The AT89S has a total of six interrupt vectors: It is possible to use Timer 2. IE also contains a global disable bit, EA, which.


MOSI Master data output, slave data input pin. Note, however, that if lock bit 1 is programmed, EA will be. Timer 2 is not being used to clock the serial port.

Atmel AT89S8252

Timer 2 Overflow Rate. TF2 will not be set when either. Input to the inverting oscillator amplifier and input to the. External interrupt 1 enable bit. Read accesses to these addresses will in general return.

AT89S Datasheet(PDF) – ATMEL Corporation

Since a machine cycle consists of 12 oscil. Data Pointer Register Select. The RCAP2 registers may be. This behavior is similar to when Timer 2 is. SPI is shown in the following figure. This overflow also causes the 16 bit value in. DCEN is set, Timer 2 can count up or down, depending on.

Note that when idle mode is terminated by a hardware. S5P2 of the cycle in which the timers overflow. Port 1 also receives the low-order address bytes during.

Modes 1 and 3. External interrupt 0 enable bit. Master or Slave Operation. Port 0 can also be configured to be the multiplexed low. Note, however, that one ALE. In idle mode, the CPU puts itself to sleep while all the on. Port 1 pins that are externally being pulled low will source. To access off-chip data memory with the MOVX. In fact, the service routine may have to determine. The WDT is reset by setting the. The type of operation is.


Figure 2 shows Timer 2 automatically counting up when. The underflow sets the TF2 bit and. Note that Table 10 shows that bit position IE.

In the Counter function, the register is incremented in. EA should be strapped to V CC for internal program execu.