R4F24568NVFQV Renesas Electronics America, R4F24568NVFQV Datasheet - Page 322
![MCU 128KKB FLASH 48K 144-LQFP](/photos/28/61/286117/144-lqfp__plqp0144ka-a_sml.jpg)
R4F24568NVFQV
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
-
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Part Number:
R4F24568NVFQV
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Section 6 Bus Controller (BSC)
(3)
If an external read occurs after an external write while the ICIS2 bit is set to 1 in BCR, an idle
cycle is inserted at the start of the read cycle.
Figure 6.79 shows an example of the operation in this case. In this example, bus cycle A is a CPU
write cycle and bus cycle B is a read cycle from an external device. In (a), an idle cycle is not
inserted, and a collision occurs in bus cycle B between the CPU write data and read data from an
external device. In (b), an idle cycle is inserted, and a data collision is prevented.
Page 292 of 1392
Read after Write
Address bus
CS (area A)
CS (area B)
HWR, LWR
Data bus
Figure 6.79 Example of Idle Cycle Operation (Read after Write)
RD
φ
(a) No idle cycle insertion
T
(ICIS2 = 0)
1
Bus cycle A
Long output floating time
T
2
T
3
Bus cycle B
T
1
T
2
Data collision
Address bus
CS (area A)
CS (area B)
Data bus
HWR
RD
φ
T
(b) Idle cycle insertion
1
Bus cycle A
(ICIS2 = 1, initial value)
T
H8S/2456, H8S/2456R, H8S/2454 Group
2
T
3
REJ09B0467-0350 Rev. 3.50
Idle cycle
T
i
Bus cycle B
T
1
T
2
Jul 07, 2010
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