Freescale Semiconductor MCF5480 - Manual (Page 634)

MCF548x Reference Manual, Rev. 3
22-32 Freescale Semiconductor
22.8.5 AFEU Interrupt Mask Register (AFIMR)
The interrupt mask register, shown in Figure 22-24 , controls the result of detected errors. For a given error,
if the corresponding bit in this register is set, the error is disabled; no error interrupt occurs and the interrupt
status register is not updated to reflect the error. If the corresponding bit is not set, then upon detection of
an error, the interrupt status register is updated to reflect the error, causing assertion of the error interrupt
signal, and causing the module to halt processing.
29 OFE Output FIFO error. The AFEU output FIFO was detected non-empty upon write of AFEU data size
register.
0 No error detected
1 Output FIFO non-empty error
28 IFE Input FIFO error. The AFEU Input FIFO was detected non-empty upon generation of done interrupt
0 Input FIFO non-empty error enabled
1 Input FIFO non-empty error disabled
27 — Reserved, should be cleared.
26 IFO Input FIFO overflow. The AFEU input FIFO has been pushed while full.
0 No error detected
1 Input FIFO has overflowed
Note: When operating as a master, the SEC implements flow-control, and FIFO size is not a limit
to data input.
25 OFU Output FIFO underflow. The AFEU output FIFO has been read while empty.
0 No error detected
1 Output FIFO has underflow error
24-21 — Reserved, should be cleared.
20 IE Internal error. An internal processing error was detected while performing encryption.
0 No error detected
1 Internal error
19 ERE Early read error. The AFEU Context Memory or Control was read while the AFEU was performing
encryption.
0 No error detected
1 Early read error
18 CE Context error. The AFEU mode register, key register, key size register, data size register, or context
memory is modified while AFEU processes data.
0 No error detected
1 Context error
17 KSE Key size error. A value outside the bounds 1–16 bytes was written to the AFEU key size register
0 No error detected
1 Key size error
16 DSE Data size error. An inconsistent value (not a multiple of 8 bits, or larger than 64 bits) was written to
the AFEU data size register.
0 No error detected
1 Data size error
15-0 — Reserved, should be cleared.
Table 22-20. AFISR Field Descriptions (Continued)
Bits Names Description