mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 397

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

21.2.2
The DTXMRn registers program DMA request and increment modes for the timers.
21.2.3
DTERn, shown in
DTERn[REF]. This reporting happens regardless of the corresponding DMA request or interrupt enable
values, DTXMRn[DMAEN] and DTMRn[ORRI,CE].
Writing a 1 to DTERn[REF] or DTERn[CAP] clears it (writing a 0 does not affect bit value); both bits can
be cleared at the same time. If configured to generate an interrupt request, clear REF and CAP early in the
interrupt service routine so the timer module can negate the interrupt request signal to the interrupt
controller. If configured to generate a DMA request, processing of the DMA data transfer automatically
clears the REF and CAP flags via the internal DMA ACK signal.
Freescale Semiconductor
MODE16
DMAEN
Field
6–1
7
0
IPSBAR
Offset:
Reset:
DMA request. Enables DMA request output on counter reference match or capture edge event.
0 DMA request disabled
1 DMA request enabled
Reserved, must be cleared.
Selects the increment mode for the timer. Setting MODE16 is intended to exercise the upper bits of the 32-bit timer
in diagnostic software without requiring the timer to count through its entire dynamic range. When set, the counter’s
upper 16 bits mirror its lower 16 bits. All 32 bits of the counter remain compared to the reference value.
0 Increment timer by 1
1 Increment timer by 65,537
W
R
DMA Timer Extended Mode Registers (DTXMRn)
DMA Timer Event Registers (DTERn)
0x00_0402 (DTXMR0)
0x00_0442 (DTXMR1)
0x00_0482 (DTXMR2)
0x00_04C2 (DTXMR3)
DMAEN
0
7
Figure
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
21-4, reports capture or reference events by setting DTERn[CAP] or
6
0
0
Table 21-3. DTXMRn Field Descriptions
Figure 21-3. DTXMRn Registers
0
0
5
0
0
4
Description
0
0
3
0
0
2
Access: User read/write
DMA Timers (DTIM0–DTIM3)
0
0
1
MODE16
0
0
21-5