R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 242
R4F24278NVFQU
Manufacturer Part Number
R4F24278NVFQU
Description
MCU 512K/48K 2.7-5.5V 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2400r
Datasheet
1.R4F24278NVFQU.pdf
(1482 pages)
Specifications of R4F24278NVFQU
Core Processor
H8S/2600
Core Size
16/32-Bit
Speed
33MHz
Connectivity
EBI/EMI, I²C, IrDA, SCI, Smart Card, SPI, SSU, UART/USART
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
98
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Eeprom Size
-
Ram Size
64K 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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R4F24278NVFQU
Manufacturer:
REALTEK
Quantity:
2 300
Company:
Part Number:
R4F24278NVFQU
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 7 Bus Controller (BSC)
7.5.6
Some external I/O devices require a setup time and hold time between address and CS signals and
strobe signals such as RD, HWR, and LWR. Settings can be made in the CSACR register to insert
states in which only the CS, AS, and address signals are asserted before and after a basic bus space
access cycle. Extension of the CS assertion period can be set for individual areas. With the CS
assertion extension period in write access, the data setup and hold times are less stringent since the
write data is output to the data bus.
Figure 7.20 shows an example of the timing when the CS assertion period is extended in basic bus
3-state access space.
Page 212 of 1448
Read
(when
RDNn = 0)
Write
Figure 7.20 Example of Timing when Chip Select Assertion Period Is Extended
Extension of Chip Select (CS) Assertion Period
φ
Address bus
CSn
AS
RD
Data bus
HWR, LWR
Data bus
T
h
T
1
Bus cycle
T
Write data
2
H8S/2427, H8S/2427R, H8S/2425 Group
Read data
T
3
REJ09B0565-0100 Rev. 1.00
T
t
Jul 22, 2010
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