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Control input for slave write access cycles. In the power-down mode the RAM is.

The falling edge of ALE strobes the address into external latch. The Port pins are driven to their reset conditions when a.

Interrupt Enable Control 1. SCL output the serial clock to slave peripherals. Hardware Watchdog Timer registers: If bit IT1 in this register is set, bits. Interrupt Priority Control Low 1. This pin must be held low to force the device to fetch code from external.


T0, T1 and T2. Input to the on-chip inverting oscillator amplifier.

AT89C Datasheet(PDF) – ATMEL Corporation

Write signal asserted during external data memory write operation. This pin must be set to V DD for normal operation. Test mode entry signal.

Interrupt Priority Dataxheet High 1. SCL input the serial clock from master. Address Latch Enable Output. When Timer 1 operates as a counter, a falling edge on the T1 pin. All the internal clocks to the peripherals and CPU core are gen. Timer 1 Gate Input. Data MSB for Slave port access used for bit mode only.

The serial input is P3. The clock controller outputs three different clocks as shown in Fatasheet 5: The X1 pin can also be used as at89v5131 for an external 48 MHz clock. Timer 0 Gate Input. If an external oscillator is used, its output is connected to this pin. SCK outputs clock to the slave peripheral or receive clock from the master. When Timer 0 operates as a counter, a falling edge on the T0 pin.


Programmable Counter Array Signal Description.

AT89C5131-RDTIL Datasheet

VSS is used to supply the buffer ring and the digital core. Endpoint 0 for Control Transfers: If bit IT0 is cleared, bits IE0 is set by. Alternate function of Port 4. This module integrates the USB transceivers with a 3. Port 0Port 1 Port 2 Port 3 Port vatasheet.

AT89C5131 Datasheet PDF

Holding one of these pins high or low for 24 oscillator periods triggers a. Alternate function of Port 1. It is latched during reset and. Data LSB for Slave port access used for 8-bit and bit modes.