HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 206
HD6477021X20V
Manufacturer Part Number
HD6477021X20V
Description
MCU 5V 32K PB-FREE 100-TQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7020r
Datasheet
1.HD6417020SVX12IV.pdf
(511 pages)
Specifications of HD6477021X20V
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 Size
32KB (32K x 8)
Program Memory Type
OTP
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6477021X20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Figure 9.4 shows how the priority order changes when channel 0 and channel 1 transfers are
requested simultaneously and a channel 3 transfer is requested during the channel 0 transfer. The
DMAC operates as follows:
(1) When channel 0 transfers
Initial priority order
Priority order
after transfer
(2) When channel 3 transfers
Initial priority order
Priority order
after transfer
(3) When channel 2 transfers
Initial priority order
Priority order
after transfer
Post-transfer priority order when
there is an immediate transfer
request to channel 3 only
(4) When channel 1 transfers
Initial priority order
Priority order
after transfer
ch0
ch0
ch0
ch0
ch0
ch1
ch3
ch3
ch3
ch3
ch3
ch3
ch2
Figure 9.3 Round-Robin Mode
ch0
ch2
ch2
ch2
ch2
ch2
ch2
ch1
ch2
ch3
ch1
ch1
ch1
ch1
ch1
ch1
ch0
ch1
ch2
ch0
ch3
ch0
ch3
Channel 0 becomes
bottom priority
Channel 3 becomes bottom
priority. The priority of channel
0, which was higher than
channel 3, is also shifted.
Channel 2 becomes bottom
priority. The priority of channels
0and 3, which were higher than
channel 2, are also shifted.
If immediately thereafter there
is a request to transfer channel
3 only, channel 3 becomes
bottom priority and the priority
of channels 0 and 1, which
were higher than channel 3,
are also shifted.
Priority order does not change
RENESAS 187
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