
MC68336/376
REGISTER SUMMARY
MOTOROLA
USER’S MANUAL
Rev. 15 Oct 2000
D-65
D.7.12 DASM Data Register A
DASMA is the data register associated with channel A. Table D-47 shows how
DASMA is used with the different modes of operation.
D.7.13 DASM Data Register B
DASMB is the data register associated with channel B. Table D-48 shows how
DASMB is used with the different modes of operation. Depending on the mode select-
ed, software access is to register B1 or register B2.
DASM3A — DASM3 Data Register A
$YFF41A
DASM4A — DASM4 Data Register A
$YFF422
DASM9A — DASM9 Data Register A
$YFF44A
DASM10A — DASM10 Data Register A
$YFF452
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET:
U
Table D-47 DASMA Operations
Mode
DASMA Operation
DIS
DASMA can be accessed to prepare a value for a subsequent mode selection
IPWM
DASMA contains the captured value corresponding to the trailing edge of the measured pulse
IPM
DASMA contains the captured value corresponding to the most recently detected user-specified rising
or falling edge
IC
DASMA contains the captured value corresponding to the most recently detected user-specified rising
or falling edge
OCB
DASMA is loaded with the value corresponding to the leading edge of the pulse to be generated. Writ-
ing to DASMA in the OCB and OCAB modes also enables the corresponding channel A comparator
until the next successful comparison.
OCAB
DASMA is loaded with the value corresponding to the leading edge of the pulse to be generated. Writ-
ing to DASMA in the OCB and OCAB modes also enables the corresponding channel A comparator
until the next successful comparison.
OPWM
DASMA is loaded with the value corresponding to the leading edge of the PWM pulse to be generated.
DASM3B — DASM3 Data Register B
$YFF41C
DASM4B — DASM4 Data Register B
$YFF424
DASM9B — DASM9 Data Register B
$YFF44C
DASM10B — DASM10 Data Register B
$YFF454
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESET:
U