Motorola MPC533 Reference Manual page 765

Address
0x30 60EA MDASM29 Data B Register (MDASMBR)
0x30 60EC MDASM29 Status/Control Register Duplicated (MDASMSCRD)
0x30 60EE MDASM29 Status/Control Register (MDASMSCR)
0x30 60F0 MDASM30 Data A Register (MDASMAR)
0x30 60F2 MDASM30 Data B Register (MDASMBR)
0x30 60F4 MDASM30 Status/Control Register Duplicated (MDASMSCRD)
0x30 60F6 MDASM30 Status/Control Register (MDASMSCR)
0x30 60F8 MDASM31 Data A Register (MDASMAR)
0x30 60FA MDASM31 Data B Register (MDASMBR)
0x30 60FC MDASM31 Status/Control Register Duplicated (MDASMSCRD)
0x30 60FE MDASM31 Status/Control Register (MDASMSCR)
17.9.8.2 MDASM Data A (MDASMAR) Register
MSB 1 2
0
Field
Reset
Addr 0x30 6058, 0x30 6060, 0x30 6068, 0x30 6070, 0x30 6078, 0x30 60D8, 0x30 60E0, 0x30 60E8, 0x30 60F0, 0x30 60F8
Figure 17-21. MDASM Data A Register (MDASMAR)
Bits Name
0:15 AR MDASMAR is the data register associated with channel A; its use varies with the different modes of
operation:
DIS mode: MDASMAR can be accessed to prepare a value for a subsequent mode selection.
IPWM mode: MDASMAR contains the captured value corresponding to the trailing edge of the
measured pulse.
IPM and IC modes: MDASMAR contains the captured value corresponding to the most recently
detected dedicated edge (rising or falling edge).
OCB and OCAB modes: MDASMAR is loaded with the value corresponding to the leading edge of
the pulse to be generated. Writing to MDASMAR in the OCB and OCAB modes also enables the
corresponding channel A comparator until the next successful comparison.
OPWM mode: MDASMAR is loaded with the value corresponding to the leading edge of the PWM
pulse to be generated.
NOTE: In IC, IPM, or IPWM mode, when a read to register A or B occurs at the same time as a
counter bus capture into that register and the counter bus is changing value, then the counter bus
capture to that register is delayed.
MOTOROLA
Table 17-19. MDASM Address Map (continued)
3 4 5
Table 17-20. MDASMAR Bit Descriptions
Chapter 17. Modular Input/Output Subsystem (MIOS14)
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
MIOS14 Double Action Submodule (MDASM)
Register
MDASM30
MDASM31
6 7 8 9
AR
Undefined
Description
10 11 12 13 14 LSB
15
17-41