MC68336/376
REGISTER SUMMARY
MOTOROLA
USER’S MANUAL
Rev. 15 Oct 2000
D-62
D.7.11 DASM Status/Interrupt/Control Registers
FLAG — Event Flag
This status bit indicates whether or not an input capture or output compare event has
occurred. If the IL[2:0] field is non-zero, an interrupt request is generated when the
FLAG bit is set.
0 = An input capture or output compare event has not occurred
1 = An input capture or output compare event has occurred
Table D-44 shows the status of the FLAG bit in different DASM operating modes.
The FLAG bit is set by hardware and cleared by software, or by system reset. Clear
the FLAG bit either by writing a zero to it, having first read the bit as a one, or by se-
lecting the DIS mode.
IL[2:0] — Interrupt Level
When the DASM generates an interrupt request, IL[2:0] determines which of the
interrupt request signals is asserted. When a request is acknowledged, the CTM4
compares IL[2:0] to a mask value supplied by the CPU32 to determine whether to
respond. IL[2:0] must have a value in the range of $0 (interrupts disabled) to $7
(highest priority).
IARB3 — Interrupt Arbitration Bit 3
This bit and the IARB[2:0] field in BIUMCR are concatenated to determine the interrupt
arbitration number for the submodule requesting interrupt service. Refer to
D.7.1 BIUWOR — Wired-OR Mode
DASM3SIC — DASM3 Status/Interrupt/Control Register
$YFF418
DASM4SIC — DASM4 Status/Interrupt/Control Register
$YFF420
DASM9SIC — DASM9 Status/Interrupt/Control Register
$YFF448
DASM10SIC — DASM10 Status/Interrupt/Control Register
$YFF450
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
FLAG
IL[2:0]
IARB3
NOT
USED
WOR
BSL
IN
FORC
A
FORC
B
ED-
POL
MODE[3:0]
RESET:
0
U
0
Table D-44 DASM Mode Flag Status Bit States
Mode
Flag Status Bit State
DIS
FLAG bit is reset
IPWM
FLAG bit is set each time there is a capture on channel A
IPM
FLAG bit is set each time there is a capture on channel A, except for the first time
IC
FLAG bit is set each time there is a capture on channel A
OCB
FLAG bit is set each time there is a successful comparison on channel B
OCAB
FLAG bit is set each time there is a successful comparison on either channel A or B
OPWM
FLAG bit is set each time there is a successful comparison on channel A