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Port 1 digital output capability is not supported on this device.

AN-644 APPLICATION NOTE Frequency Measurement Using Timer 2 on a MicroConverter

The SFR registers include control, configuration, daatsheet data registers, which provide an interface between the CPU and other on-chip peripherals. Set by hardware at the end of the 8th bit in Mode 0, or halfway through the stop bit in Modes 1, 2, and 3.

Dual 8-bit PWM 1 1 0 Mode 6: Whenever possible, avoid large discontinuities in the ground plane s like those formed by a long trace on the same layersince they force return signals to travel a longer path. Timer 2 can also be configured to generate a repetitive trigger for ADC conversions. The prescaler is used to set the timeout period in which an interrupt is generated.

ADuC Datasheet and Product Info | Analog Devices

As represented in Figure 85, when the friction lock tab is at the right, the ground pin should datashewt the lower of the two pins when viewed from the top. Set by the user to enable, or cleared to disable power supply monitor interrupts. Cleared by the user to disable autoswapping of the DPTR. To configure this port pin as a digital input, write a 0 to the port bit.


The start bit is skipped and the 8 data bits are clocked into the serial port shift register. The ALE output is at the core operating frequency. Port 2 also emits the highorder address bytes during fetches from external program memory, and middle and high order address bytes during accesses to the bit external data memory space. TL0 serves as a 5-bit prescaler. The supply monitor is also protected against spurious glitches triggering the interrupt circuit.

When an interrupt occurs, the program counter is pushed onto the stack, and the corresponding interrupt vector address is loaded into the program counter. Eight data bits are transmitted or received. Set by the user to enable the serial port to use Timer 2 overflow pulses for its transmit clock in serial port Modes 1 and 3.

Also note that the SS pin is not used in master mode. When set to 0 by the user, the internal XRAM is not accessible, and the external data memory is mapped into the lower two kBytes of external data memory.


This allows a full rail-to-rail output from the DAC, which should then be buffered externally using a dual-supply op amp in order to get a rail-torail output. As the output is forced to source or sink more current, the nonlinear regions at the top or bottom respectively of Figure 43 become larger.

An example of this configuration is shown in Figure For more information about lead-free parts, please consult our Pb Lead free information page. The interface then must be reset using the I2CRS bit. Because Timer 2 has a bit autoreload mode, a wider range of baud rates is possible using Timer 2. Trademarks and registered trademarks are the property of their respective owners.

ADuC841 Datasheet PDF

This is a read-only bit. Set by the user to initiate the ADC into a continuous mode of conversion.

An acquisition of three or more ADC clocks is recommended; clocks are as follows: Transmission is initiated by any instruction that writes to SBUF. Timer 0 Timer or Counter Select Bit. Check Analog Devices website www. To be more specific, a byte can be programmed only if it already holds the value FFH.