Modular Input/Output Subsystem (MIOS14)
MPC561/MPC563 Reference Manual, Rev. 1.2
17-70
Freescale Semiconductor
17.12.6.2 MIOS14 Interrupt Level Register 1 (MIOS14LVL1)
This register contains the interrupt level that applies to the submodules number 15 to zero.
17.13 MIOS14 Function Examples
The versatility of the MIOS14 timer architecture is based on multiple counters and capture/compare
channel units interconnected on 16-bit counter buses. This section includes some typical application
examples to show how the submodules can be interconnected to form timing functions. The diagrams used
to illustrate these examples show only the blocks utilized for that function.
To illustrate the timing range of the MIOS14 in different applications, many of the following paragraphs
include time intervals quoted in microseconds and seconds. The assumptions used are that f
SYS
is at 40
MHz with minimum overall prescaling (50 ns cycle) and with the maximum overall prescaling (32 µs
cycle). For other f
SYS
clock cycle rates and prescaler choices, the times mentioned in these paragraphs
scale appropriately.
17.13.1 MIOS14 Input Double Edge Pulse Width Measurement
To measure the width of an input pulse, the MIOS14 double action submodule (MDASM) has two capture
registers so that only one interrupt is needed after the second edge. The software can read both edge
Table 17-42. MIOS14LVL0 Bit Descriptions
Bits
Name
Description
0:4
—
Reserved
5:7
LVL
Interrupt request level. This field represents one of eight possible levels.
8:9
TM
Time multiplexing. This field determines the multiplexed time slot
10:15
—
Reserved
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LSB
15
Field
—
LVL
TM
—
SRESET
0000_0000_0000_0000
Addr
0x30 6C70
Figure 17-42. MIOS14 Interrupt Level Register 1
(MIOS14LVL1)
Table 17-43. MIOS14LVL1 Bit Descriptions
Bits
Name
Description
0:4
—
Reserved
5:7
LVL
Interrupt request level. This field represents one of eight possible levels.
8:9
TM
Time multiplexing. This field determines the multiplexed time slot.
10:15
—
Reserved
Summary of Contents for MPC561
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