HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 624
HD6417751RF240V
Manufacturer Part Number
HD6417751RF240V
Description
MPU 1.5/3.3V 0K PB-FREE 256-QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7750r
Datasheet
1.D6417751RBP200DV.pdf
(1226 pages)
Specifications of HD6417751RF240V
Core Processor
SH-4
Core Size
32-Bit
Speed
240MHz
Connectivity
EBI/EMI, FIFO, SCI, SmartCard
Peripherals
DMA, POR, WDT
Number Of I /o
39
Program Memory Type
ROMless
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
1.4 V ~ 1.6 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
256-QFP Exposed Pad, 256-eQFP, 256-HQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417751RF240V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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14. Direct Memory Access Controller (DMAC)
Figure 14.4 shows the changes in priority levels when transfer requests are issued simultaneously
for channels 0 and 3, and channel 1 receives a transfer request during a transfer on channel 0. The
operation of the DMAC in this case is as follows.
Rev.4.00 Oct. 10, 2008 Page 524 of 1122
REJ09B0370-0400
Transfer on channel 0
Transfer on channel 1
Transfer on channel 2
Transfer on channel 3
Priority after transfer due to
issuance of a transfer request
for channel 1 only.
Initial priority order
Priority order after transfer
Initial priority order
Priority order after transfer
Initial priority order
Priority order after transfer
Initial priority order
Priority order after transfer
CH0 > CH1 > CH2 > CH3
CH0 > CH1 > CH2 > CH3
CH0 > CH1 > CH2 > CH3
CH0 > CH1 > CH2 > CH3
Figure 14.3 Round Robin Mode
CH0 > CH1 > CH2 > CH3
CH1 > CH2 > CH3 > CH0
CH2 > CH3 > CH0 > CH1
CH3 > CH0 > CH1 > CH2
CH2 > CH3 > CH0 > CH1
Channel 0 is given the lowest
priority.
When channel 1 is given the
lowest priority, the priority of
channel 0, which was higher
than channel 1, is also
shifted simultaneously.
When channel 2 is given the
lowest priority, the priorities of
channels 0 and 1, which were
higher than channel 2, are
also shifted simultaneously. If
there is a transfer request for
channel 1 only immediately
afterward, channel 1 is given
the lowest priority and the
priorities of channels 3 and 0
are simultaneously shifted
down.
No change in priority order
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