
FlexCAN
23-16
Freescale Semiconductor
23.3.8
Interrupt Flag Register (IFLAG)
IFLAG contains one interrupt flag bit per buffer. Each successful transmission/reception sets the
corresponding IFLAG bit and, if the corresponding IMASK bit is set, generates an interrupt.
The interrupt flag is cleared by writing a 1, while writing 0 has no effect.
23.3.9
Message Buffer Structure
The message buffer memory map starts at an offset of 0x80 from the FlexCAN’s base address
(0xFC02_0000). The 256-byte message buffer space is fully used by the16 message buffer structures.
Each message buffer consists of a control and status field that configures the message buffer, an identifier
field for frame identification, and up to 8 bytes of data.
Address: 0xFC02_0030 (IFLAG)
Access: User read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
BUFnI
W
w1c
Reset 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Figure 23-11. FlexCAN Interrupt Flags Register (IFLAG)
Table 23-10. IFLAG Field Descriptions
Field
Description
31–16
Reserved, must be cleared.
15–0
BUFnI
Buffer interrupt flag. Indicates a successful transmission/reception for the corresponding message buffer. If the
corresponding IMASK bit is set, an interrupt request is generated. The user must write a 1 to clear an interrupt flag;
writing 0 has no effect.
0 No such occurrence.
1 The corresponding buffer has successfully completed transmission or reception.
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...