R4F24268NVFQV Renesas Electronics America, R4F24268NVFQV Datasheet - Page 317

• Manufacturer Part Number: R4F24268NVFQV
• Description: MCU 256K FLASH 48K 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

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: -

H8S/2426, H8S/2426R, H8S/2424 Group
(4)
Depending on the system's load conditions, the RD signal may lag behind the CS signal. An
example is shown in figure 6.80. In this case, with the setting for no idle cycle insertion (a), there
may be a period of overlap between the bus cycle A RD signal and the bus cycle B CS signal.
Setting idle cycle insertion, as in (b), however, will prevent any overlap between the RD and CS
signals. In the initial state after reset release, idle cycle insertion (b) is set.
REJ09B0466-0350 Rev. 3.50
Jul 09, 2010
Relationship between Chip Select (CS) Signal and Read (RD) Signal
Address bus
CS (area A)
CS (area B)
Figure 6.80 Relationship between Chip Select (CS) and Read (RD)
RD
Overlap period between CS (area B)
and RD may occur
φ
(a) No idle cycle insertion
T
(ICIS1 = 0)
1
Bus cycle A
T
2
T
3
Bus cycle B
T
1
T
2
Address bus
CS (area A)
CS (area B)
RD
φ
T
(b) Idle cycle insertion
1
Bus cycle A
(ICIS1 = 1, initial value)
T
2
T
3
Section 6 Bus Controller (BSC)
Idle cycle
T
i
Bus cycle B
T
1
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T
2