Freescale Semiconductor MCF54455 Reference Manual page 381

Pin Multiplexing and Control
16.3.5.13 IRQ Pin Assignment Register (PAR_IRQ)
The PAR_IRQ register controls the functions of the IRQ pins.
Address: 0xFC0A_4070 (PAR_IRQ)
7
R 0
W
Reset: 0
Note: For 256-pin devices and 360-pin devices where the PCI is disabled through reset configuration, the
PAR_IRQ reset state is 0. For 360-pin devices where PCI is enabled through reset configuration, the reset
state is 1 when the PCI is an agent and 0 when the PCI is a host. Therefore, reset state is 0 when
BOOTMOD[1:0] equals 00, and reset state is the complement value of FB_AD[3] when BOOTMOD[1:0]
equals 10. For BOOTMOD equaling 11, reset state is the value of serial boot bit 103.
Field
7–5 Reserved, should be cleared.
4 IRQ4 pin assignment.
PAR_IRQ4 0 IRQ4 pin configured as GPIO or external interrupt request 4 function as determined by the edge port module.
See Chapter 18, "Edge Port Module (EPORT),"
1 IRQ4 pin configured for SSI input clock fuction.
3–2 Reserved, should be cleared.
1 IRQ1 pin assignment.
PAR_IRQ1 0 IRQ1 pin configured as GPIO or external interrupt request 1 function as determined by the edge port module.
See Chapter 18, "Edge Port Module (EPORT),"
1 IRQ1 pin configured for PCI interrupt fuction.
0 Reserved, should be cleared.
16.3.5.14 PCI Pin Assignment Register (PAR_PCI)
The PAR_PCI register controls the functions of the PCI grant and request pins.
Address: 0xFC0A_4072 (PAR_PCI)
15 14 13
R 0
PAR_
GNT3
W
Reset
See Note 0
Note: Reset state is 1 when the PCI is enabled through reset configuration and is 0 otherwise.
16-36
6 5 4
0 0
PAR_IRQ4
0 0 0
Figure 16-46. IRQ Pin Assignment (PAR_IRQ)
Table 16-21. PAR_IRQ Field Descriptions
for details.
for details.
12 11 10 9
0 0
PAR_ PAR_
GNT2 GNT1
See See
0 0
Note Note
Figure 16-47. PCI Pin Assignment (PAR_PCI)
3 2
0 0
0 0
Description
8 7 6 5
0
PAR_ PAR_
GNT0 REQ3
See
See Note 0
Note
Access: User read/write
1 0
0
PAR_IRQ1
See Note 0
Access: User read/write
4 3 2 1
0 0
PAR_ PAR_
REQ2 REQ1
See See
0 0
Note Note
Freescale Semiconductor
0
PAR_
REQ0
See
Note