R4F24568NVFQV Renesas Electronics America, R4F24568NVFQV Datasheet - Page 343

• 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
6.12.3
Figure 6.96 shows the timing for transition to the bus released state.
Figure 6.97 shows the timing for transition to the bus released state with the synchronous DRAM
interface.
REJ09B0467-0350 Rev. 3.50
Jul 07, 2010
Address bus
HWR, LWR
Data bus
BREQO
BREQ
BACK
RD
AS
[1] Low level of BREQ signal is sampled at rise of φ.
[2] Bus control signal returns to be high at end of external space access cycle.
[3] BACK signal is driven low, releasing bus to external bus master.
[4] BREQ signal state is also sampled in external bus released state.
[5] High level of BREQ signal is sampled.
[6] BACK signal is driven high, ending external bus release cycle.
[7] When there is external access or refresh request of internal bus master during external
[8] Normally BREQO signal goes high 1.5 states after rising edge of BACK signal. If BREQO
φ
Transition Timing
signal is asserted because of CBR refreshing request, it retains low until CBR refresh cycle starts up.
At least one state from sampling of BREQ signal.
bus release while BREQOE bit is set to 1, BREQO signal goes low.
External space
access cycle
T
Figure 6.96 Bus Released State Transition Timing
1
[1]
T
2
[2]
[3]
[4]
[5]
External bus released state
High impedance
High impedance
High impedance
High impedance
High impedance
[6]
Section 6 Bus Controller (BSC)
[7]
Page 313 of 1392
[8]
CPU
cycle