R4F24278NVFQU Renesas Electronics America, R4F24278NVFQU Datasheet - Page 293
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
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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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H8S/2427, H8S/2427R, H8S/2425 Group
7.8.8
When the command interval specification from the ACTV command to the next READ/WRIT
command cannot be satisfied, 1 to 3 states (Trw) that output the NOP command can be inserted
between the Tr cycle that outputs the ACTV command and the Tc1 cycle that outputs the column
address by setting the RCD1 and RCD0 bits of DRACCR. Use the optimum setting for the wait
time according to the synchronous DRAM connected and the operating frequency of this LSI.
Figure 7.58 shows an example of the timing when the one Trw state is set.
REJ09B0565-0100 Rev. 1.00
Jul 22, 2010
Figure 7.58 Example of Access Timing when Row Address Output Hold State Is 1 State
Read
Write
Row Address Output State Control
DQMU, DQML
DQMU, DQML
Precharge-sel
Address bus
SDRAMφ
Data bus
Data bus
CKE
CKE
RAS
RAS
CAS
CAS
WE
WE
(RCD1 = 0, RCD0 = 1, SDWCD = 0, CAS Latency 2)
Column
address
PALL
PALL
T
p
ACTV
ACTV
T
r
Row address
Row address
NOP
High
High
T
rw
NOP
READ
T
c1
Column address
WRIT
T
cl
Section 7 Bus Controller (BSC)
NOP
NOP
T
c2
Page 263 of 1448
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