YLCDRSK2378 Renesas Electronics America, YLCDRSK2378 Datasheet - Page 197
YLCDRSK2378
Manufacturer Part Number
YLCDRSK2378
Description
KIT DEV EVAL H8S/2378 LCD
Manufacturer
Renesas Electronics America
Series
H8®r
Datasheet
1.YR0K42378FC000BA.pdf
(1208 pages)
Specifications of YLCDRSK2378
Main Purpose
Displays, LCD Controller
Embedded
Yes, MCU, 16-Bit
Utilized Ic / Part
YLCDRSK2378
Primary Attributes
5.7" QVGA, Touch Screen
Secondary Attributes
Source Code on CD, Debugging Requires Emulator Cable E10A USB/JTAG
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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5.6.2
In interrupt control mode 2, mask control is done in eight levels for interrupt requests except for
NMI by comparing the EXR interrupt mask level (I2 to I0 bits) in the CPU and the IPR setting.
Figure 5.4 shows a flowchart of the interrupt acceptance operation in this case.
1. If an interrupt source occurs when the corresponding interrupt enable bit is set to 1, an
2. When interrupt requests are sent to the interrupt controller, the interrupt with the highest
3. Next, the priority of the selected interrupt request is compared with the interrupt mask level set
4. When the CPU accepts an interrupt request, it starts interrupt exception handling after
5. The PC, CCR, and EXR are saved to the stack area by interrupt exception handling. The PC
6. The T bit in EXR is cleared to 0. The interrupt mask level is rewritten with the priority level of
7. The CPU generates a vector address for the accepted interrupt and starts execution of the
interrupt request is sent to the interrupt controller.
priority according to the interrupt priority levels set in IPR is selected, and lower-priority
interrupt requests are held pending. If a number of interrupt requests with the same priority are
generated at the same time, the interrupt request with the highest priority according to the
priority system shown in table 5.2 is selected.
in EXR. An interrupt request with a priority no higher than the mask level set at that time is
held pending, and only an interrupt request with a priority higher than the interrupt mask level
is accepted.
execution of the current instruction has been completed.
saved on the stack shows the address of the first instruction to be executed after returning from
the interrupt handling routine.
the accepted interrupt.
If the accepted interrupt is NMI, the interrupt mask level is set to H'7.
interrupt handling routine at the address indicated by the contents of the vector address in the
vector table.
Interrupt Control Mode 2
Rev.7.00 Mar. 18, 2009 page 129 of 1136
Section 5 Interrupt Controller
REJ09B0109-0700
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