R4F24269NVFQV Renesas Electronics America, R4F24269NVFQV Datasheet - Page 476

• Manufacturer Part Number: R4F24269NVFQV
• Description: MCU 256KB FLASH 64K 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24269NVFQV

• 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: 64K 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: -

Section 8 EXDMA Controller (EXDMAC)
φ
EDREQ
Address bus
EXDMA control
Channel
EDREQ pin sampling is performed in each cycle starting at the next rise of φ after the end of the
EDMDR write cycle for setting the transfer-enabled state.
When a low level is sampled at the EDREQ pin while acceptance via the EDREQ pin is possible,
the request is held within the EXDMAC. Then when activation is initiated within the EXDMAC,
the request is cleared, and EDREQ pin high level sampling for edge sensing is started. If EDREQ
pin high level sampling is completed by the end of the EXDMA write cycle, acceptance resumes
after the end of the write cycle, and EDREQ pin low level sampling is performed again; this
sequence of operations is repeated until the end of the transfer.
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[1]
[2], [5] Request is cleared at end of next bus cycle, and activation is started in EXDMAC.
[3], [6] EXDMA cycle start; EDREQ pin high level sampling is started at rise of φ.
[4], [7] When EDREQ pin high level has been sampled, acceptance is resumed after completion of dead cycle.
Acceptance after transfer enabling; EDREQ pin low level is sampled at rise of φ, and request is held.
(As in [1], EDREQ pin low level is sampled at rise of φ, and request is held.)
Idle
Figure 8.19 Example of Block Transfer Mode Transfer Activated
[1]
Minimum 3 cycles
Bus release
Request
[2]
Read
Request clearance period
[3]
Transfer source
EXDMA
by EDREQ Pin Falling Edge
read
One block transfer
Write
EXDMA
destination
Transfer
write
Acceptance
resumed
Idle
[4]
Minimum 3 cycles
Request
Bus release
[5]
Request clearance period
Read
H8S/2426, H8S/2426R, H8S/2424 Group
[6]
Transfer source
EXDMA
One block transfer
read
Write
REJ09B0466-0350 Rev. 3.50
EXDMA
destination
Transfer
write
Acceptance
resumed
Idle
[7]
Bus release
Jul 09, 2010