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The extended interrupt handler provides 16 interrupt sources into the CIP as opposed to 7 for the stan- dardallowing numerous analog and digital peripherals to interrupt the controller.

It can be assigned the value of the parity flag bit P in reg- ister PSW for error detection, or used in multiprocessor communications USB0 Voltage Regulator in low power mode. Comparator1 Negative Hysteresis Control Bits. Ports are available as ADC inputs Flash bytes would typically be erased set to 0xFF before being reprogrammed.

The board is quite simple since only a handful components are needed. Electrical specifications for the preci- sion internal oscillator are given in Table In this mode, the maximum packet size datasheett halved and the FIFO may contain two packets at a time.

C8051F320 PDF Datasheet浏览和下载

MCU interrupt sources, associ- ated vector addresses, dataeheet order and control bits are summarized in Table 9. This bit controls the SPI0 clock phase. Email Required, but never shown. This bit sets the priority of the Timer 3 interrupt.


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Instruction and CPU Timing Input range specified for regulation. Enable interrupt requests generated by SMB0. The four special function registers related to the operation of the SPI0 Bus are described in the following figures. The sensitivity of the switches is also easily configurable in firmware which enables two useful features. Addresses above 0x3DFF are reserved.

Second, the configurable sensitivity makes the switches easy to use with a variety of materials covering the PCB, such as plexiglass, glass, or various plastics. These bits select Port pins to be skipped by the Crossbar Decoder.

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Silicon Labs’ capacitive touch sense solution uses the switch capacitor as part of a simple RC resistor-capacitor relaxation oscillator. Why does EP1 allow faster transfer than EP2?

The ADC data is 2 bytes per sample, so 31 samples in a 64B report and 15 samples in 32B report are transferred per report. This bit sets the masking of the SMB0 interrupt.

When a digital resource is selected, the least-significant unassigned Port pin is assigned to that resource excluding UART0, which is always at pins 4 and 5 Port pin is assigned, the Crossbar skips that pin when assigning the next selected resource With 2 Bytes in a sample this results in 32kHz maximum sampling rate.


IN Endpoint 2 Interrupt Enable 0: SFR Bus Figure I’ve added 2 resistor to be able to share the c2ck programming pin with a reset button. It seems that the time to fill a report with samples must be longer than bInterval.

It returns to logic 0 when a data byte is transferred to the shift register from the transmit buffer or by a transition on SCK. Elcodis is a trademark of Elcodis Company C80051f320. The ratio of stencil aperture to land pad size should be 1: D- Signal Status This bit indicates the current logic level of the D— pin.

All undefined SFR locations are reserved. All dimensions shown are in millimeters mm unless otherwise noted.

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SCK line high in idle state. The capacitor should be no greater than pF; however for very small capacitors, the total capacitance may be dominated by parasitic capacitance in the PCB layout. At any particular time, it will be operating in one of the following four modes: Suspend signaling is detected on the bus.

Interrupt Register Descriptions The SFRs used datasheey enable the interrupt sources and dztasheet their priority level are described below.