R4F24568NVFQV Renesas Electronics America, R4F24568NVFQV Datasheet - Page 305

• Manufacturer Part Number: R4F24568NVFQV
• Description: MCU 128KKB FLASH 48K 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24568NVFQV

• Core Processor: H8S/2600
• Core Size: 16/32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SSU, UART/USART, USB
• 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 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
• Eeprom Size: -

H8S/2456, H8S/2456R, H8S/2454 Group
Section 6 Bus Controller (BSC)
T Rp
T Rr
T Rc1
T Rc2
φ
SDRAMφ
Address bus
Precharge-sel
RAS
CAS
WE
CKE
High
PALL
REF
NOP
Figure 6.66 Auto Refresh Timing
When the interval specification from the PALL command to the REF command cannot be
satisfied, setting the RCW1 and RCW0 bits of REFCR enables one to three wait states to be
inserted after the T
cycle that is set by the TPC1 and TPC0 bits of DRACCR. Set the optimum
Rp
number of waits according to the synchronous DRAM connected and the operating frequency of
this LSI. Figure 6.67 shows the timing when one wait state is inserted. Since the setting of bits
TPC1 and TPC0 of DRACCR is also valid in refresh cycles, the command interval can be
extended by the RCW1 and RCW0 bits after the precharge cycles.
REJ09B0467-0350 Rev. 3.50
Page 275 of 1392
Jul 07, 2010