
MB90945 Series
37
(Continued)
: The interrupt request flag is cleared by the EI
2
OS interrupt clear signal.
: The interrupt request flag is cleared by the EI
2
OS interrupt clear signal. A stop request is available.
: Unavailable
N/A : The interrupt request flag is not cleared by the EI
2
OS interrupt clear signal.
Notes :
For a peripheral module with two interrupt causes for a single interrupt number, both interrupt request
flags are cleared by the EI
2
OS interrupt clear signal.
At the end of EI
2
OS, the EI
2
OS clear signal will be asserted for all the interrupt flags assigned to the same
interrupt number. If one interrupt flag starts the EI
2
OS and in the meantime another interrupt flag is set
by hardware event, the later event is lost because the flag is cleared by the EI
2
OS clear signal caused
by the first event. So it is recommended not to use the EI
2
OS for this interrupt number.
If EI
2
OS is enabled, EI
2
OS is initiated when one of the two interrupt signals in the same interrupt control
register (ICR) is asserted. This means that different interrupt sources share the same EI
2
OS Descriptor
which should be unique for each interrupt source. For this reason, when one interrupt source uses the
EI
2
OS, the other interrupt should be disabled.
Interrupt cause
EI
2
OS
clear
Interrupt vector
Interrupt control
register
Number
Address
Number
Address
UART 2 RX / UART 3 RX
#39
FFFF60
H
ICR14
0000BE
H
UART 2 TX / UART 3 TX
#40
FFFF5C
H
Flash memory
N/A
#41
FFFF58
H
ICR15
0000BF
H
Delayed interrupt
N/A
#42
FFFF54
H