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Chapter 8
Interrupt/Exception Processing Function
Preliminary User’s Manual U15839EE1V0UM00
8.3.5 Interrupt mask registers 0 to 3 (IMR0 to IMR3)
These registers set the interrupt mask state for the maskable interrupts.
The xxMK bit of the IMR0 to IMR3 registers is equivalent to the xxMK bit of the xxIC register.
IMRm registers can be read/written in 16-bit units (m = 0 to 3).
When the IMRm register is divided into two registers: higher 8 bits (IMRmH register) and lower 8 bits
(IMRmL register), these registers can be read/written in 8-bit or 1-bit units (m = 0 to 3).
The address of the lower 8-bit register IMRmL is equal to that of the 16-bit IMRm register, and the
higher 8-bit register IMRmH can be accessed on the following address (address (IMRm) + 1).
Figure 8-11:
Interrupt Mask Registers 0 to 3 (IMR0 to IMR3)
Remark:
xx: Identification name of each peripheral unit (WT, TMD, P, TMG, GCC, AD, MAC, FC, CSI,
UART, DMA)
15
14
13
12
11
10
9
8
Address
Initial value
IMR0
GCC03MK GCC02MK GCC01MK GCC00MK TMG01MK TMG00MK
P5MK
P4MK
FFFFF100H
FFFFH
7
6
5
4
3
2
1
0
P3MK
P2MK
P1MK
P0MK
WTIMK
TMD1MK
TMD0MK
WTMK
15
14
13
12
11
10
9
8
Address
Initial value
IMR1
FC1RXMK
MACMK
ADMK
CCC01MK CCC00MK TMC0MK GCC15MK GCC14MK
FFFFF102H
FFFFH
7
6
5
4
3
2
1
0
GCC13MK GCC12MK GCC11MK GCC10MK TMG11MK TMG10MK GCC05MK GCC04MK
15
14
13
12
11
10
9
8
Address
Initial value
IMR2
SR0MK
SER0MK
CSI2MK
CSI1MK
CSI0MK FC4ERMK FC4TXMK FC4RXMK
FFFFF104H
FFFFH
7
6
5
4
3
2
1
0
FC3ERMK FC3TXMK FC3RXMK FC2ERMK FC2TXMK FC2RXMK FC1ERMK FC1TXMK
15
14
13
12
11
10
9
8
Address
Initial value
IMR3
1
P21MK
P20MK
P15MK
P10MK
P05MK
P00MK
DOVFMK
FFFFF106H
FFFFH
7
6
5
4
3
2
1
0
DMA3MK DMA2MK DMA1MK DMA0MK
ST1MK
SR1MK
SER1MK
ST0MK
Bit Position
Bit Name
Function
15 to 0
xxMK
Interrupt mask flag.
0: Interrupt servicing enabled
1: Interrupt servicing disabled (pending)
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