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Enhanced Direct Memory Access (eDMA)
16-20
Freescale Semiconductor
Table 16-25. TCDn_DADDR Field Descriptions
Field
Description
31–0
DADDR
Destination address. Memory address pointing to the destination data.
Address: 0xFC0 (0x20
×
n) (TCDn_CITER)
Access: User read/write
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
E_LINK = 1
R
E_LINK
0
0
LINKCH
CITER
W
E_LINK = 0
R
E_LINK
CITER
W
Reset
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Figure 16-24. TCDn Current Major Iteration Count (TCDn_CITER)
Table 16-26. TCDn_CITER Field Descriptions
Field
Description
15
E_LINK
Enable channel-to-channel linking on minor-loop complete. As the channel completes the minor loop, this
flag enables linking to another channel, defined by the LINKCH field. The link target channel initiates a
channel service request via an internal mechanism that sets the TCDn_CSR[START] bit of the specified
channel.
If channel linking is disabled, the CITER value is extended to 15 bits in place of a link channel number. If
the major loop is exhausted, this link mechanism is suppressed in favor of the MAJOR_E_LINK channel
linking.
0 The channel-to-channel linking is disabled.
1 The channel-to-channel linking is enabled.
Note: This bit must be equal to the BITER.E_LINK bit. Otherwise, a configuration error is reported.
14–13
Reserved, must be cleared.
12–9
LINKCH
Link channel number. If channel-to-channel linking is enabled (E_LINK = 1), then after the minor loop is
exhausted, the eDMA engine initiates a channel service request to the channel defined by these four bits
by setting that channel’s TCDn_CSR[START] bit.
0–15 Link to DMA channel 0–15
14–0 or
8–0
CITER
Current major iteration count. This 9-bit (E_LINK = 1) or 15-bit (E_LINK = 0) count represents the current
major loop count for the channel. It is decremented each time the minor loop is completed and updated in
the transfer control descriptor memory. After the major iteration count is exhausted, the channel performs
a number of operations (e.g., final source and destination address calculations), optionally generating an
interrupt to signal channel completion before reloading the CITER field from the beginning iteration count
(BITER) field.
Note: When the CITER field is initially loaded by software, it must be set to the same value as that
contained in the BITER field.
Note: If the channel is configured to execute a single service request, the initial values of BITER and CITER
should be 0x0001.
MCF5329 Reference Manual, Rev 3
Summary of Contents for MCF5329
Page 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Page 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...