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CLS
11
10
01
00
FL
17.9 MIOS14 Double Action Submodule (MDASM)
The MIOS14 double action submodule (MDASM) is a function included in the MIOS14
library. It is a versatile 16-bit dual action submodule capable of performing two event
operations before software intervention is required. It can perform two event operations
such as PWM generation and measurement, input capture, output compare, etc.
The MDASM is composed of two timing channels (A and B), an output flip-flop, an input
edge detector and some control logic. All control and status bits are contained in the
MDASM status and control register.
The following sections describe the MDASM in detail. A block diagram of the MDASM is
shown in Figure 17-14.
MOTOROLA
Chapter 17. Modular Input/Output Subsystem (MIOS14)
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Table 17-15. MMCSMCNT Clock Signal
Clocking Selected
MMCSM clock prescaler
Clock signal rising-edge
Clock signal falling-edge
Table 17-16. Prescaler Values
Prescaler Value
(CP in Hex)
FF
FE
FD
FC
FB
FA
F9
F8
......
02
01
00
MIOS14 Double Action Submodule (MDASM)
None (disable)
MIOS14 Prescaler Clock
Divided By
1
2
3
4
5
6
7
8
........
254 (2^8 -2)
255 (2^8 -1)
256 (2^8)
17-25
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