AT89C5131 DATASHEET PDF

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This pin is set to 0 for at least 12 oscillator periods when an internal reset.

AT89C Datasheet(PDF) – ATMEL Corporation

P0, P1, P2, P3, P4. Interrupt Priority Control High 0. IE1 are set by a falling edge on INT1. Endpoint 0 for Control Transfers: Timer 0, Timer 1 and Timer 2 Signal Description. If an external oscillator is used, its output is connected to this pin. Test mode entry signal. The clock controller outputs three different clocks as shown in Figure 5: SCK outputs clock to the slave peripheral or receive clock from the master.

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Output of the on-chip inverting oscillator amplifier. Write signal asserted during external data memory write operation. If bit IT0 is cleared, bits IE0 is set by. AT89C has two software-selectable at89cc5131 of reduced activity for further reduction. Timer 0 Gate Input.

When Timer 0 operates as a counter, a falling edge on the T0 pin. SCL output the serial clock to slave peripherals. The Port pins are driven to their reset conditions when a. The table below shows all SFRs with their address and their reset value.

T0, T1 and T2. USB events or external interrupts. This pin must be held low to force the device to fetch code from external. In the power-down mode the RAM is. Power and clock control registers: Alternate function of Port 1.

USB pull-up Controlled Output. Input to the on-chip inverting oscillator amplifier. Hardware Watchdog Timer registers: Interrupt Priority Control Low 1. Control input for slave port read access cycles.

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When Timer 1 operates as a counter, a falling edge on the T1 pin.

AT89C5131 Datasheet PDF

Holding this pin low for 64 oscillator periods while the oscillator is running. Value of capacitors and crystal characteristics are detailed in.

VDD is used to supply the buffer ring on all versions of the device. Port 0Port 1 Port 2 Port 3 Port att89c5131. IE0 are set by a falling edge on INT0. Low Power Voltage Range. Address Bus MSB for external access.

Data LSB for Slave port access used for 8-bit and bit modes. Holding one of these pins high or low for 24 oscillator periods triggers a. It is also used to power the on-chip voltage regulator of the Standard.