R4F24268NVFQV Renesas Electronics America, R4F24268NVFQV Datasheet - Page 470
R4F24268NVFQV
Manufacturer Part Number
R4F24268NVFQV
Description
MCU 256K FLASH 48K 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Datasheet
1.R4F24268NVZFQV.pdf
(1406 pages)
Specifications of R4F24268NVFQV
Core Processor
H8S/2600
Core Size
16/32-Bit
Speed
33MHz
Connectivity
EBI/EMI, I²C, IrDA, SCI, SSU, UART/USART
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 10x10b, D/A 2x8b
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R4F24268NVFQV
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Section 8 EXDMA Controller (EXDMAC)
(1)
If transfer requests for different channels are issued during a transfer operation, the highest-
priority channel (excluding the currently transferring channel) is selected. The selected channel
begins transfer after the currently transferring channel releases the bus. If there is a bus request
from a bus master other than the EXDMAC at this time, a cycle for the other bus master is
initiated. If there is no other bus request, the bus is released for one cycle.
Channel switching does not take place during a burst transfer or a block transfer of a single block.
Figure 8.13 shows a case in which transfer requests for channels 2 and 3 are issued
simultaneously. The example shown in the figure illustrates the handling of external requests in
the cycle steal mode.
(2)
If transfer requests for different channels are issued during a transfer in auto request cycle steal
mode, the operation depends on the channel priority. If the channel that made the transfer request
is of higher priority than the channel currently performing transfer, the channel that made the
transfer request is selected.
If the channel that made the transfer request is of lower priority than the channel currently
performing transfer, that channel's transfer request is held pending, and the currently transferring
channel remains selected.
Page 440 of 1372
Transfer Requests from Multiple Channels (Except Auto Request Cycle Steal Mode)
Transfer Requests from Multiple Channels in Auto Request Cycle Steal Mode
φ
Address bus
EXDMA control
Channel 2
Channel 3
Figure 8.13 Example of Channel Priority Timing
Idle
Request
Request cleared
held
Channel 2
Selected
Channel 2 transfer
Request cleared
Channel 2
Channel 3
release
Bus
H8S/2426, H8S/2426R, H8S/2424 Group
Channel 3 transfer
Channel 3
REJ09B0466-0350 Rev. 3.50
release
Bus
Jul 09, 2010
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