AT89C5131 DATASHEET PDF

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The Port pins are driven to their reset conditions when a. Control input for slave write access cycles.

Alternate function of Port 4. If bit IT1 is cleared, bits IE1 is set by.

In the idle mode the CPU is frozen while the timers, the serial. These pins can be directly connected to the Cathode of standard LEDs.

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Power Signal Description Continued. Interrupt Priority Control Low 0. Alternate function of Port 3. Interrupt Enable Control 0.

AT89C5131-RDTIL Datasheet

It is also used to power the on-chip voltage regulator of the Standard. A Max Power-down Current. VDD is used to supply the buffer ring on all versions of the device.

If bit IT0 is cleared, bits IE0 is set by. All the internal clocks to the peripherals and CPU core are gen. Timer 1 Gate Input.

It is latched during reset and. Timer 0 Gate Input. If an st89c5131 oscillator is used, leave XTAL2 unconnected. Value of capacitors and crystal characteristics are detailed in.

USB Development Board – Tips

Write signal asserted during external data memory write operation. Keypad Interface Signal Description. Read signal asserted during external data memory read operation. Interrupt Priority Control High 0. Holding one of these pins high or low for 24 oscillator periods triggers a. When Timer 0 operates as a counter, a falling edge on the T0 pin. P0, P1, P2, P3, P4. Hardware Watchdog Timer registers: The table below shows all SFRs with their address and their reset value.

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Timer 0, Timer 1 and Timer 2 Signal Description. The typical current of each. Interrupt Enable Control 1. Low Power Voltage Range. The falling edge of ALE strobes the address into external latch.

Atmel AT89C5131

Data MSB for Slave port access used for bit mode only. USB events or external interrupts.

Test mode entry signal. IE0 are set by a falling edge on INT0. This pin must be set to V DD for normal operation. This pin must be held low to force the device to fetch code from external.

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