HD6417032F20V Renesas Electronics America, HD6417032F20V Datasheet - Page 226

• Manufacturer Part Number: HD6417032F20V
• Description: SH1 ROMLESS LEAD FREE
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7030r

Specifications of HD6417032F20V

• Core Processor: SH-1
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 112-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 9 Direct Memory Access Controller (DMAC)
1. Transfer requests are generated simultaneously for channels 1 and 0.
2. Channel 0 has a higher priority, so the channel 0 transfer begins first (channel 1 waits for
3. A channel 3 transfer request occurs during the channel 0 transfer (channels 1 and 3 are both
4. When the channel 0 transfer ends, channel 0 becomes the lowest priority.
5. At this point, channel 3 has a higher priority than channel 1, so the channel 3 transfer begins
6. When the channel 3 transfer ends, channel 3 becomes the lowest priority.
7. The channel 1 transfer begins.
8.
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transfer).
waiting)
(channel 1 waits for transfer).
When the channel 1 transfer ends, channels 1 and 2 shift downward in priority so that channel
1 becomes the lowest priority.
(1) Channels 0 and 1
Transfer request
(3) Channel 3
Figure 9.4 Changes in Channel Priority in Round-Robin Mode
Waiting channel(s)
1
1, 3
1
None
(2) Channel 0
(4) Channel 0
(5) Channel 3
(6) Channel 3
(7) Channel 1
(8) Channel 1
DMAC operation
transfer starts
transfer ends
transfer starts
transfer ends
transfer starts
transfer ends
Priority order
Priority order
Priority order
changes
changes
changes
Channel priority
0
3
2
0
3
2
1
3
2
1
0
2
1
0
3
1