13.2.1.7 Software and Level n IACK Registers (SWIAC" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉锛� MCF5270CVM150R2
寤犲晢锛� Freescale Semiconductor
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Interrupt Controller Modules
MCF5271 Reference Manual, Rev. 2
13-14
Freescale Semiconductor
13.2.1.7 Software and Level n IACK Registers (SWIACKR, L1IACK鈥揕7IACK)
The eight IACK registers can be explicitly addressed via the CPU, or implicitly addressed via a
processor-generated interrupt acknowledge cycle during exception processing. In either case, the
interrupt controller鈥檚 actions are very similar.
First, consider an IACK cycle to a specific level: that is, a level-n IACK. When this type of IACK
arrives in the interrupt controller, the controller examines all the currently-active level n interrupt
requests, determines the highest priority within the level, and then responds with the unique vector
number corresponding to that specific interrupt source. The vector number is supplied as the data
for the byte-sized IACK read cycle. In addition to providing the vector number, the interrupt
23
FEC
X_INTF
Transmit frame interrupt
Write X_INTF = 1
24
X_INTB
Transmit buffer interrupt
Write X_INTB = 1
25
UN
Transmit FIFO underrun
Write UN = 1
26
RL
Collision retry limit
Write RL = 1
27
R_INTF
Receive frame interrupt
Write R_INTF = 1
28
R_INTB
Receive buffer interrupt
Write R_INTB = 1
29
MII
MII interrupt
Write MII = 1
30
LC
Late collision
Write LC = 1
31
HBERR
Heartbeat error
Write HBERR = 1
32
GRA
Graceful stop complete
Write GRA = 1
33
EBERR
Ethernet bus error
Write EBERR = 1
34
BABT
Babbling transmit error
Write BABT = 1
35
BABR
Babbling receive error
Write BABR = 1
36
PIT0
PIF
PIT interrupt flag
Write PIF = 1 or write PMR
37
PIT1
PIF
PIT interrupt flag
Write PIF = 1 or write PMR
38
PIT2
PIF
PIT interrupt flag
Write PIF = 1 or write PMR
39
PIT3
PIF
PIT interrupt flag
Write PIF = 1 or write PMR
40
RNG
EI
RNG interrupt flag
Write RNGCR[CI] = 1
41
SKHA
INT
SKHA interrupt flag
Write SKCMR[CI] = 1
42
MDHA
MI
MDHA interrupt flag
Write MDCMR[CI] = 1
43鈥�63
Not used
Table 13-13. Interrupt Source Assignment For INTC (Continued)
Sourc
e
Modul
e
Flag
Source Description
Flag Clearing Mechanism
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PDF鎻忚堪
VI-B2P-IY-F3 CONVERTER MOD DC/DC 13.8V 50W
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MC9328MXLVP20R2 IC MCU I.MX 200MHZ 225-MAPBGA
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