MPC8308VMAGD Freescale Semiconductor, MPC8308VMAGD Datasheet - Page 559
MPC8308VMAGD
Manufacturer Part Number
MPC8308VMAGD
Description
MPU POWERQUICC II PRO 473MAPBGA
Manufacturer
Freescale Semiconductor
Datasheets
1.MPC8308VMAGD.pdf
(90 pages)
2.MPC8308VMAGD.pdf
(2 pages)
3.MPC8308VMAGD.pdf
(1170 pages)
4.MPC8308VMAGD.pdf
(14 pages)
Specifications of MPC8308VMAGD
Processor Type
MPC83xx PowerQUICC II Pro 32-Bit
Speed
400MHz
Voltage
1V
Mounting Type
Surface Mount
Package / Case
473-MAPBGA
Product
Network Processor
Data Rate
256 bps
Frequency
400 MHz
Supply Voltage (max)
3.6 V
Supply Voltage (min)
3 V
Supply Current (max)
5 uA
Maximum Operating Temperature
+ 105 C
Minimum Operating Temperature
0 C
Interface
I2C, JTAG, SPI
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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See
12.3.11 DMA Channel n Priority (DCHPRI n ), n = 0–15
When the fixed-priority channel arbitration mode is enabled (DMACR[ERCA] = 0), the contents of these
registers define the unique priorities associated with each channel within the group. The channel priorities
are evaluated by numeric value, that is, 0 is the lowest priority, 1 is the next higher priority, then 2, 3, and
so on. Software must program the channel priorities with unique values, otherwise a configuration error is
reported. The range of the priority value is limited to the values of 0 through 15. When read, the GRPPRI
bits of the DCHPRI register reflect the current priority level of the channels. See
Table 12-2
Channel preemption is enabled on a per channel basis by setting the ECP bit in the DCHPRI register.
Channel preemption allows the executing channel’s data transfers to be temporarily suspended in favor of
starting a higher priority channel. Once the preempting channel has completed all of its minor loop data
transfers, the preempted channel is restored and resumes execution. After the restored channel completes
one read/write sequence, it is again eligible for preemption. If any higher priority channel is requesting
service, the restored channel is suspended and the higher priority channel is serviced. Nested preemption
(attempting to preempt a preempting channel) is not supported. Once a preempting channel begins
execution, it cannot be preempted. Preemption is only available when fixed arbitration is selected for
channel arbitration modes.
Freescale Semiconductor
31–13
11–7
Bits
1–0
12
6
5
4
3
2
Table 12-13
ERROR_DISABLE Ignore or react to bus errors.
SNOOP_ENABLE Snoop attribute.
DMA_PRIORITY
for the DMACR definition.
RD_SAFE_
ENABLE
Name
—
—
—
—
—
for the DMAGPOR definition.
MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 0
Reserved
DMA priority.
0 Low priority
1 High priority
Reserved
0 DMA transactions are not snooped by e300 CPU data cache
1 DMA transactions are snooped by e300 CPU data cache
Reserved
0 React to bus transaction errors
1 Ignore bus transaction errors
Reserved
Read Safe enable. This bit should be set only if the target of read dma operation is a well
behaved memory which is not affected by the read operation and returns the same data if read
again from the same location. This means that unaligned reading operation can be rounded up
to enable more efficient read operations.
0 It is not safe to read more bytes that were intended
1 It is safe to read more bytes that were intended
Reserved
Table 12-13. DMAGPOR Field Descriptions
Description
Figure 12-2
DMA Controller (DMAC)
and
12-15
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