R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 372

• 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
Section 8 DMA Controller (DMAC)
8.3.9
Transfer Count Registers A and B (ETCRA and ETCRB)
ETCRA and ETCRB are 16-bit readable/writable registers that specify the number of transfers of
channels 4 and 5.
The function of ETCRA and ETCRB in normal mode differs from that in block transfer mode.
In normal mode, ETCRA functions as a 16-bit transfer counter. ETCRA is decremented by 1 each
time a data transfer is performed, and when the count reaches H'0000, transfer ends. ETCRB
cannot be used in normal mode
In block transfer mode, ETCRA functions as an 8-bit block size counter (ETCRAL) and a block
size holding register (ETCRAH). ETCRAL is decremented by 1 each time a data transfer of one
byte or one word is performed, and when the count reaches H'00, ETCRAL is loaded with the
value in ETCRAH. So by setting the block size in ETCRAH and ETCRAL, it is possible to
repeatedly transfer blocks consisting of any desired number of bytes or words.
In block transfer mode, ETCRB functions as a 16-bit block transfer counter. ETCRB is
decremented by 1 each time a block is transferred, and transfer ends when the count reaches
H'0000.
All bits in ETCRA and ETCRB are initialized to 0 at a reset.
Page 342 of 1448
REJ09B0565-0100 Rev. 1.00
Jul 22, 2010