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HIP7030A2M Datasheet(PDF) 9 Page - Intersil Corporation |
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HIP7030A2M Datasheet(HTML) 9 Page - Intersil Corporation |
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9 / 56 page  9 Functional Pin Description This section provides a description of each of the 28 pins of the HIP7030A2 MCU. VDD and VSS (Power) Power is supplied to the MCU using these two pins. VDD is connected to the positive supply and VSS is connected to the negative supply. IRQ (Maskable Interrupt Request - Input) The IRQ pin is negative edge-sensitive triggering. A high to low transition on the IRQ pin will produce an interrupt. In the event of an interrupt request, the MCU always com- pletes the current instruction before it responds to the request. An internal mask can be used to inhibit the MCU from responding to IRQ interrupts. An IRQ interrupt is generated if the IRQ pin is pulled low for at least one tILIH. The occurrence of the low going pulse is registered in a flip-flop and the IRQ interrupt will be recog- nized even if the IRQ pin has returned to a high state before the interrupt can be serviced. Once the edge-sensitive flip-flop is cleared, (it is automati- cally cleared at the start of the interrupt service routine) the interrupt request is removed until the IRQ pin returns to a high level and once again goes low. See INTERRUPTS for more details concerning IRQ inter- rupts. RESET (Master Reset - Input) The HIP7030A2 contains an integrated Power-On Reset (POR) circuit and the RESET input is therefore not required for start-up. It can be used to reset the MCU internal state and provides for an orderly re-start of the software after ini- tial power-up. Refer to Resets for a detailed description of POR and RESET. TCAP (Timer Capture - Input) The TCAP input controls the input capture feature for the on- chip programmable timer system. The TCAP input is also used as the strobe signal to the Port D strobed outputs. Refer to Input Capture Register and PD0, PD1 Strobed Out- put Mode for additional information. TCMP (Timer Compare - Output) The TCMP pin provides an output for the output compare feature of the on-chip timer system. Refer to Output Com- pare Register for additional information. OSCIN (Oscillator Input - Input), OSCOUT (Oscillator Output - Output), OSCB (Oscillator Buffered Output - Output) OSCIN is the input and OSCOUT is the output of an inverter/amplifier which can be used to build either a quartz crystal or ceramic resonator based clock oscillator. Alterna- tively, the OSCIN input can be driven from any external clock source which satisfies the CMOS Schmitt trigger input level requirements of the OSCIN pin. See Electrical Specifications for input level specification. NOTE: 1. Measurement points are VOL, VOH, VIL and VIH. FIGURE 3H. SPI SLAVE TIMING CPOL = 1, CPHA = 0 Serial Peripheral Interface (SPI) Timing Diagrams (Continued) SS (INPUT) SCK (INPUT) MISO (OUTPUT) MOSI (INPUT) D7O D7I D6O D0O D6I D0I (2) (5) (4) (10) (11) (8) (1) (12) (13) (3) (9) (7) (6) HIP7030A2 |
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