E62655RUSB Renesas Electronics America, E62655RUSB Datasheet - Page 154
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E62655RUSB
Manufacturer Part Number
E62655RUSB
Description
EMULATOR BASE H8S/2655R W/USB
Manufacturer
Renesas Electronics America
Type
Microcontrollerr
Datasheet
1.E62655RUSB.pdf
(1093 pages)
Specifications of E62655RUSB
Contents
E6000 Emulator Unit and 4 Logic Probes
For Use With/related Products
H8S/2655R
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 154 of 1093
- Download datasheet (6Mb)
Section 5 Interrupt Controller
5.5
5.5.1
When an interrupt enable bit is cleared to 0 to disable interrupts, the disabling becomes effective
after execution of the instruction.
In other words, when an interrupt enable bit is cleared to 0 by an instruction such as BCLR or
MOV, if an interrupt is generated during execution of the instruction, the interrupt concerned will
still be enabled on completion of the instruction, and so interrupt exception handling for that
interrupt will be executed on completion of the instruction. However, if there is an interrupt
request of higher priority than that interrupt, interrupt exception handling will be executed for the
higher-priority interrupt, and the lower-priority interrupt will be ignored.
The same also applies when an interrupt source flag is cleared.
Figure 5.12 shows and example in which the CMIEA bit in 8-bit timer TCR is cleared to 0.
Rev. 5.00 Sep 14, 2006 page 124 of 1060
REJ09B0331-0500
Internal
address bus
Internal
write signal
CMIEA
CMFA
CMIA
interrupt signal
Usage Notes
Contention between Interrupt Generation and Disabling
Figure 5.12 Contention between Interrupt Generation and Disabling
TCR write cycle by CPU
TCR address
CMIA exception handling
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