
Interrupt Controller Modules
14-10
Freescale Semiconductor
NOTE
Only one copy of this register exists among the 2 interrupt controller
modules. All reads and writes to this register must be made to the INTC0
memory space.
14.2.8
Saved Level Mask Register (SLMASK)
The SLMASK register is provided so the interrupt controller can optionally automatically manage
masking of interrupt requests based on the programmed priority level. If enabled by ICONFIG[EMASK]
bit being set, an interrupt acknowledge read cycle returns a vector number identifying the physical request
source, and the CLMASK register is loaded with the level number associated with the request. After the
CLMASK register is updated, then all interrupt requests with level numbers equal to or less than this value
are masked by the controller and are not allowed to cause the assertion of the interrupt signal to the
processor core. As the CLMASK register is updated during the IACK cycle read, the former value is saved
in the SLMASK register.
Typically, after a level-
n
interrupt request is managed, the service routine restores the saved level mask
value into the current level mask register to re-enable the lower priority requests.
NOTE
Only one copy of this register exists among the two interrupt controller
modules. All reads and writes to this register must be made to the INTC0
memory space.
Address: 0xFC04_801E (CLMASK)
Access: User read/write
7
6
5
4
3
2
1
0
R
0
0
0
0
CLMASK
W
Reset:
0
0
0
0
1
1
1
1
Figure 14-10. Current Level Mask Register (CLMASK)
Table 14-12. CLMASK Field Descriptions
Field
Description
7–4
Reserved, must be cleared.
3–0
CLMASK
Current level mask. Defines the level mask, where only interrupt levels greater than the current value are processed
by the controller
0000 Level 1 – 7 requests are processed.
0001 Level 2 – 7 requests are processed.
0010 Level 3 – 7 requests are processed.
0011 Level 4 – 7 requests are processed.
0100 Level 5 – 7 requests are processed.
0101 Level 6 – 7 requests are processed.
0110 Level 7 requests are processed.
0111 All requests are masked.
1000 – 1110 Reserved.
1111 Level 1 – 7 requests are processed.
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...