HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 82

• Manufacturer Part Number: HD6477021X20V
• Description: MCU 5V 32K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7020r

Specifications of HD6477021X20V

• Core Processor: SH-1
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

5.1
The interrupt controller (INTC) determines the priority of interrupt sources and controls interrupt
requests to the CPU. INTC has registers for assigning priority levels to interrupt sources. These
registers handle interrupt requests according to user-established priorities.
5.1.1
The interrupt controller has the following features:
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5.1.2
Figure 5.1 is a block diagram of the interrupt controller.
16 settable priority levels: Five interrupt priority registers can set 16 levels of interrupt
priorities for IRQ and on-chip peripheral interrupt sources.
The INTC has an NMI input level T bit that indicates NMI pin status. By reading this bit with
the interrupt exception service routine, the pin status can be checked for use in a noise
canceller function.
The interrupt controller can notify external devices (via the IRQOUT pin) that an onchip
interrupt has been occured. In this way an external device can, for example, be informed if an
on-chip interrupt occurs while the chip is operating in a bus-released mode and the bus has
been requested.
Overview
Features
Block Diagram
Section 5 Interrupt Controller (INTC)
RENESAS 61