D13002F16V Renesas Electronics America, D13002F16V Datasheet - Page 108

• Manufacturer Part Number: D13002F16V
• Description: IC H8/3002 ROMLESS 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of D13002F16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SCI
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 38
• Program Memory Type: ROMless
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

5.4 Interrupt Operation
5.4.1 Interrupt Handling Process
The H8/3002 handles interrupts differently depending on the setting of the UE bit. When UE = 1,
interrupts are controlled by the I bit. When UE = 0, interrupts are controlled by the I and UI bits.
Table 5-4 indicates how interrupts are handled for all setting combinations of the UE, I, and
UI bits.
NMI interrupts are always accepted except in the reset and hardware standby states. IRQ
interrupts and interrupts from the on-chip supporting modules have their own enable bits.
Interrupt requests are ignored when the enable bits are cleared to 0.
Table 5-4 UE, I, and UI Bit Settings and Interrupt Handling
SYSCR
UE
1
0
UE = 1: Interrupts IRQ
masked by the I bit in the CPU’s CCR. Interrupts are masked when the I bit is set to 1, and
unmasked when the I bit is cleared to 0. Interrupts with priority level 1 have higher priority.
Figure 5-4 is a flowchart showing how interrupts are accepted when UE = 1.
I
0
1
0
1
CCR
UI
—
—
—
0
1
0
Description
All interrupts are accepted. Interrupts with priority level 1 have higher
priority.
No interrupts are accepted except NMI.
All interrupts are accepted. Interrupts with priority level 1 have higher
priority.
NMI and interrupts with priority level 1 are accepted.
No interrupts are accepted except NMI.
to IRQ
5
and interrupts from the on-chip supporting modules can all be
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