Motorola MPC8260 User Manual
4-44
MPC8260 PowerQUICC II UserÕs Manual
MOTOROLA
Part II. ConÞguration and Reset
4.3.3.3 Periodic Interrupt Timer Register (PITR)
The periodic interrupt timer register (PITR), shown in Figure 4-40, is a read-only register
that shows the current value in the periodic interrupt down counter. The PITR counter is not
affected by reads or writes to it.
that shows the current value in the periodic interrupt down counter. The PITR counter is not
affected by reads or writes to it.
4.4 SIU Pin Multiplexing
Some functions share pins. The actual pinout of the MPC8260 is shown in the hardware
speciÞcations. The control of the actual functionality used on a speciÞc pin is shown in
speciÞcations. The control of the actual functionality used on a speciÞc pin is shown in
Table 4-22. PITC Field Descriptions
Bits
Name
Description
0Ð15
PITC
Periodic interrupt timing count. Bits 0Ð15 are deÞned as the PITC, which contains the count for the
periodic timer. Setting PITC to 0xFFFF selects the maximum count period.
periodic timer. Setting PITC to 0xFFFF selects the maximum count period.
16Ð31
Ñ
Reserved, should be cleared.
Bits
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field
PIT
Reset
0000_0000_0000_0000
R/W
Read Only
Addr
Bits
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Field
Ñ
Reset
0000_0000_0000_0000
R/W
Read Only
Addr
0x1024A
Figure 4-40. Periodic Interrupt Timer Register (PITR)
Table 4-23. PITR Field Descriptions
Bits
Name
Description
0Ð15
PITC
Periodic interrupt timing count. Bits 0Ð15 are deÞned as the PIT. It contains the current count
remaining for the periodic timer. Writes have no effect on this Þeld.
remaining for the periodic timer. Writes have no effect on this Þeld.
16Ð31
Ñ
Reserved, should be cleared.