AT89C Usb Cbased Microcontroller With 32K Bytes Flash, 1K Byte Data EePROM, Bytes Details, datasheet, quote on part number: AT89C AT89C datasheet, AT89C pdf, AT89C data sheet, datasheet, data sheet, pdf, Atmel, USB Cbased Microcontroller with 32K Bytes Flash. The AT90USBKey provides the following features: AT90USB QFN AVR Studio ® software interface (1). USB software interface for Device Firmware Upgrade.

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T0, T1 and T2. Endpoint 0 for Control Transfers: Endpoint 1, 2, 3: Idle and Power-down Modes. Low Power Voltage Range. A Max Power-down Current. AT89C is a high-performance Flash version dayasheet the 80C51 single-chip 8-bit micro. This module integrates the USB transceivers with a 3. AT89C has two software-selectable modes of reduced activity for further reduction. In the idle mode the CPU is frozen while the timers, the serial. In the power-down mode the RAM is. USB events or external interrupts.

Port 0Port 1 Port 2 Port 3 Port 4. Alternate function of Port 1. Alternate function of Port 3. Alternate function of Port 4. Keypad Interface Signal Description.

Holding one of these pins high or low for 24 oscillator periods triggers a. Programmable Counter Array Signal Description. The serial input is P3. The xt89c5131 output is P3. Timer 0, Timer 1 and Timer 2 Signal Description.

Timer 0 Gate Input. If bit IT0 in this register is set, bits. IE0 are set by a falling at89c131 on INT0. If bit IT0 is cleared, bits IE0 is set by. Timer 1 Gate Input. If bit IT1 in this register is set, bits. IE1 are set by a falling edge on INT1. If bit IT1 is cleared, bits IE1 is set by.


AT89C Datasheet(PDF) – ATMEL Corporation

Timer Counter 0 External Clock Input. When Timer 0 operates as a counter, a falling edge on the T0 pin. When Timer 1 operates as a counter, a falling edge on the T1 pin. These pins can be directly connected to the Cathode of standard LEDs. The typical current of each.

SCL output the datasbeet clock to slave peripherals. SCL input the serial clock from master. SCK outputs clock to the slave peripheral or receive clock from the master. To avoid any parasitic current. Input to the on-chip inverting oscillator amplifier. If an external oscillator is used, its output is connected to this pin. Output of the on-chip inverting oscillator amplifier. If an external oscillator is used, leave XTAL2 unconnected.

USB Data – signal. Data LSB for Slave port access used for 8-bit and bit modes. Address Bus MSB for external access. Data MSB for Slave port access used for bit mode only. Read signal asserted during external data memory read operation. Control input for slave port read access cycles.

Write signal asserted during external data memory write operation.

Control input for slave write access cycles. Holding this pin low for 64 oscillator periods while the oscillator is running. The Port pins are driven to their reset conditions at895c131 a. This pin has an internal pull-up resistor which allows the device to be reset. This pin is set to 0 for at least 12 oscillator periods when an internal reset.

Address Latch Enable Output. The falling edge of ALE strobes the address into external latch. Test mode entry signal.


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. It is latched during reset catasheet. VSS is used to supply the buffer ring and the digital core.

VDD is used to supply the buffer ring on all versions of the device.

AT89C5131 Datasheet PDF

It is also used to power the on-chip voltage regulator of the Standard. Power Signal Description Continued. USB pull-up Controlled Output. In standard versions, the Vref output voltage is equal to the internal. P0, P1, P2, P3, P4.

Power and clock control registers: Hardware Watchdog Timer registers: The table below shows all SFRs with their address and their reset value. Interrupt Enable Control 0. Interrupt Enable Control 1. Interrupt Priority Control Low 0. Interrupt Priority Control High 0. Interrupt Priority Control Low 1. Interrupt Priority Control High 1. The AT89C clock controller is based on an on-chip oscillator feeding an on-chip.

All the internal clocks to the peripherals and CPU core are gen. Value of capacitors and crystal characteristics are detailed in. The X1 pin can also be used as input for an external 48 MHz clock. The clock controller outputs three different clocks as shown in Figure 5: