Freescale-semiconductor MPC5200B Manual de usuario Pagina 168

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Interrupt Controller
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor 7-9
7.2.4.5 ICTL External Enable and External Types Register —MBAR + 0x0510
8:11 Per18_pri Peripheral 18 = CAN2
12:15 Per19_pri Reserved
16:19 Per20_pri Reserved
20:23 Per21_pri Peripheral 21 = XLB Arbiter
24 :27 Per22_pri Peripheral 22 = BDLC
28 :31 Per23_pri Peripheral 23 = BestComm LocalPlus
Table 7-8. ICTL External Enable and External Types Register
msb 012345678 9 101112131415
R
Reserved ECLR(4) Etype0 Etype1 Etype2 Etype3
W
RESET:0 00000000 0 0 0 00 0 0
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 lsb
R
Reserved MEE EENA(4) Reserved CEb
W
RESET:0 00000000 0 0 0 00 0 0
Bits Name Description
0:3
Reserved
ECLR[x] These bits clear external IRQ interrupt indications. When an IRQ input is configured as an
edge-sensitive input, the Interrupt Controller must be notified that the specific interrupt has
been serviced. Software must write 1 to the appropriate bit position to clear the interrupt
indication. ECLR bits are always read as 0 (i.e., they do not contain status).
4ECLR0IRQ
[0], write 1 to clear
5ECLR1IRQ[1], write 1 to clear
6ECLR2IRQ[2], write 1 to clear
7ECLR3IRQ[3], write 1 to clear
8:9 Etype0 These bits control how the Interrupt Controller interprets the IRQ[0] input pin.
00 = Input is level sensitive and active hi
01 = Input is edge sensitive, rising edge active”
10 = Input is edge sensitive, falling edge active”
11 = Input is level sensitive, and active low”
10:11 Etype1 Same as above, but for the IRQ
[1] input pin.
12:13 Etype2 Same as above, but for the IRQ[2] input pin.
14:15 Etype3 Same as above, but for the IRQ[3] input pin.
16:18 Reserved—unused bits, writing has no effect, always read as 0.
19 MEE Master External Enable—clearing this bit masks all IRQ input transitions (including status
indications).
Bits Name Description
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