HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 625

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

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: -

1. Transfer requests are issued simultaneously for channels 0 and 3.
2. Since channel 0 has a higher priority level than channel 3, the channel 0 transfer is executed
3. A transfer request is issued for channel 1 during the channel 0 transfer (channels 1 and 3 are on
4. At the end of the channel 0 transfer, channel 0 shifts to the lowest priority level.
5. At this point, channel 1 has a higher priority level than channel 3, so the channel 1 transfer is
6. At the end of the channel 1 transfer, channel 1 shifts to the lowest priority level.
7. The channel 3 transfer is started.
8. At the end of the channel 3 transfer, the channel 3 and channel 2 priority levels are lowered,
first (channel 3 is on transfer standby).
transfer standby).
started (channel 3 is on transfer standby).
giving channel 3 the lowest priority.
Figure 14.4 Example of Changes in Priority Order in Round Robin Mode
Transfer request
1. Issued for channels 0
3. Issued for channel 1
and 3
Channel
waiting
3
1, 3
3
None
2. Start of channel 0
4. End of channel 0
5. Start of channel 1
6. End of channel 1
7. Start of channel 3
8. End of channel 3
DMAC operation
transfer
transfer
transfer
transfer
transfer
transfer
14. Direct Memory Access Controller (DMAC)
Rev.4.00 Oct. 10, 2008 Page 525 of 1122
Change of
priority order
Change of
priority order
Change of
priority order
Channel priority
0 > 1 > 2 > 3
1 > 2 > 3 > 0
2 > 3 > 0 > 1
0 > 1 > 2 > 3
order
REJ09B0370-0400