R4F24268NVRFQV Renesas Electronics America, R4F24268NVRFQV Datasheet - Page 317
R4F24268NVRFQV
Manufacturer Part Number
R4F24268NVRFQV
Description
MCU 256KB FLASH 48K 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Datasheet
1.R4F24268NVZFQV.pdf
(1406 pages)
Specifications of R4F24268NVRFQV
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
-
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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
Page 287 of 1372
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