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There are two sep- arate memory spaces: Elcodis is a trademark of Elcodis Company Ltd. System Clock Selection The internal oscillator requires little start-up time and may be selected as the system clock immediately fol- lowing the Datashewt write that enables the internal oscillator.
The first key code has been written 0xA5. This bit sets the priority of the SPI0 interrupt. An internal reference is available differential external reference can be used for ratiometric measurements. SPI0 interrupt set to low priority level.
This register serves as a second accumulator for certain arithmetic operations. A illegal STOP or bus error was Last reset was not a power- reset source. The asynchronous CP0A signal is available even when the system clock is not active.
The minimum decimation ratio is This bit is set to logic 1 by hardware at datasheett end of a data transfer. The appropriate circuitry is enabled when it is needed by a peripheral.
This register contains all zeros b. Flash Write Procedure Bytes in Flash memory can be dxtasheet one byte at a time groups of two. The problem i am facing a problem in SPI communication. SPI communication works fine when debbugging single step.
Set STA to restart transfer. Analog Input Configuration Bits for P1. Last reset was a power- Write: Internal Oscillator Bias Enable. If not when you single step the hardware probably has time to write the data out the serial bus before you write the spi register again. DD This bit indicates the current power supply status below the above the Bits5—0: A Slave byte was transmitted error detected.
Idle mode halts the CPU while leaving the peripherals and internal clocks active. Modification of this register is not necessary in most applications.
ADC0 conversion in progress. External Oscillator Mode Bits. Comparator0 Rising-edge interrupt enabled. Prev Next Analog Peripherals.
This register determines the internal oscillator period. The load capacitance depends upon the crystal and the manufacturer.
Comparator0 Inputs and Outputs Therefore, the maximum response time for an interrupt when no other interrupt is currently being serviced or the new interrupt is of greater priority occurs when the CPU is performing an RETI instruction followed by a DIV as the next instruction.
Therefore, the fastest possible response time is 5 system clock cycles: Update Output Based on Timer Overflow End transfer with STOP. Reset Sources Figure Some Hardware Guy Sign up using Facebook. By requiring less intervention from the microcontroller core, an interrupt-driven system is more efficient and allows for easier implemen- tation of multi-tasking, real-time systems Serial Port 0 Operation Mode.
This bit sets the c8051f50 of External Interrupt 0. The lower bytes of data memory are used for general purpose registers and scratch pad memory. It must then deactivate the interrupt request before execution of the ISR completes dwtasheet another interrupt request will be generated.
Enable the external oscillator. Post as a guest Name. But when i run programme without break points SPI communication fails. Typical C2 Pin Sharing The memory map is shown in Figure ADC0 calibration in progress. Revision Specific Behavior Figure