R4F24268NVFQV Renesas Electronics America, R4F24268NVFQV Datasheet - Page 251
R4F24268NVFQV
Manufacturer Part Number
R4F24268NVFQV
Description
MCU 256K FLASH 48K 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Datasheet
1.R4F24268NVZFQV.pdf
(1406 pages)
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
-
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H8S/2426, H8S/2426R, H8S/2424 Group
When consecutively reading from the same area connected to a peripheral LSI whose output
floating time is long, data outputs from the peripheral LSI may conflict with address outputs from
this LSI. The data conflict can be avoided by inserting the CS assertion period extension cycle
after the access cycle. Figure 6.32 shows an example of the operation. In the figure, both bus
cycles A and B are read access cycles to the same area which is address/data multiplexed I/O
space. (a) shows an example of conflict occurring between data outputs from the peripheral LSI
whose output floating time is long and address outputs from this LSI because the CS assertion
period extension cycle is not inserted. (b) shows an example of the data conflict being avoided by
inserting the CS assertion period extension cycle.
REJ09B0466-0350 Rev. 3.50
Jul 09, 2010
Address bus
Address/data
RD
CS
AH
bus
φ
(a) Without CS assertion period extension cycle
(CSXTn = 0)
Bus cycle A
Figure 6.32 Consecutive Read Accesses to Same Area
Output floating
time is long
(Address/Data Multiplexed I/O Space)
Bus cycle B
Data conflict
Address/data
Address bus
bus
RD
CS
AH
φ
Bus cycle A
(b) With CS assertion period extension cycle
(CSXTn = 1)
Section 6 Bus Controller (BSC)
Bus cycle B
Page 221 of 1372
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