R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 449

• Manufacturer Part Number: R4F24278NVFQU
• Description: MCU 512K/48K 2.7-5.5V 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24278NVFQU

• Core Processor: H8S/2600
• Core Size: 16/32-Bit
• Speed: 33MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, Smart Card, SPI, SSU, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 98
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; 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

H8S/2427, H8S/2427R, H8S/2425 Group
8.5.14
When an NMI interrupt is requested, burst mode transfer in full address mode is interrupted. An
NMI interrupt does not affect the operation of the DMAC in other modes.
In full address mode, transfer is enabled for a channel when both the DTE bit and DTME bit in
DMABCR in common register enabled mode or the DTE bit and DTME bit in DMAECRF in
common register disabled mode are set to 1. With burst mode setting, the DTME bit is cleared
when an NMI interrupt is requested.
If the DTME bit is cleared during burst mode transfer, the DMAC discontinues transfer on
completion of the 1-byte or 1-word transfer in progress, then releases the bus, which passes to the
CPU.
The channel on which transfer was interrupted can be restarted by setting the DTME bit to 1
again. Figure 8.40 shows the procedure for continuing transfer when it has been interrupted by an
NMI interrupt on a channel designated for burst mode transfer.
REJ09B0565-0100 Rev. 1.00
Jul 22, 2010
Figure 8.40 Example of Procedure for Continuing Transfer on Channel Interrupted by
transfer on interrupted
Transfer continues
Set DTME bit to 1
Resumption of
DTME bit = 0
DTE bit = 1
channel
DMAC and NMI Interrupts
Yes
No
[1]
[2]
Transfer ends
NMI Interrupt
[1] Check that DTE = 1 and DTME = 0 in DMABCR in common
[2] Write 1 to the DTME bit.
register enabled mode or DTE = 1 and DTME = 0 in DMAECRF
in common register disabled mode .
Section 8 DMA Controller (DMAC)
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