TMPR4937XBG-300 Toshiba, TMPR4937XBG-300 Datasheet - Page 452

• Manufacturer Part Number: TMPR4937XBG-300
• Manufacturer: Toshiba

Specifications of TMPR4937XBG-300

• Family Name: TX49
• Device Core Size: 64b
• Frequency (max): 300MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.5V
• Operating Supply Voltage (max): 1.6V
• Operating Supply Voltage (min): 1.4V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 484
• Package Type: BGA
• Lead Free Status / Rohs Status: Compliant

15.3.4
Interrupt priority assigning
priority according to the priority level and interrupt number. Interrupt factors with an interrupt level
equal to or lower than the interrupt level specified by the Interrupt Mask Level Register (IRMSK) will
be excluded (masked).
set in the interrupt factor field (CAUSE) of the Interrupt Current Status Register (IRCS), the interrupt
level is set in the Interrupt Level field (LVL), and the Interrupt Flag bit (IF) is set.
reprioritization, the highest-priority interrupt is accepted, changing the Interrupt Cause (CAUSE) and
Interrupt Level (LVL) fields in the Interrupt Current Status (IRCS) register.
However, if the Interrupt Mask Level (IRMSK.LML) is set to a value equal to or greater than the
current interrupt level (IRLVLn.ILm), the Interrupt Flag bit in the Interrupt Current Status register
(IRCS.IF) is set to mask the interrupt.
When multiple interrupt requests exist, the Interrupt Controller selects the interrupt with the highest
When the interrupt with the highest priority is selected, then the interrupt number of that interrupt is
Priorities are assigned as follows.
In the following cases, interrupts are reprioritized. If any new interrupt requests are generated before
Changing the Interrupt Mask Level (IRMSK.LML) does not cause the IRC to reprioritize interrupts.
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When interrupt levels differ, the interrupt with the higher interrupt level has priority (Table
15.3.2)
When multiple interrupts with the same interrupt level are simultaneously detected, the
interrupt with the smaller interrupt number has priority (Table 15.3.1).
When an interrupt request with a higher interrupt level than that of the currently selected
interrupt is detected. If the interrupt levels are equal, the Interrupt Cause (CAUSE) field does
not change, even if the interrupt number is smaller.
When the interrupt level (IRLVLn.ILm) of the currently selected interrupt changes to a value
smaller than the current setting.
When the currently selected interrupt is cleared (refer to 15.3.6 Clearing interrupt requests).
15-6
Chapter 15 Interrupt Controller