R4F24268NVRFQV Renesas Electronics America, R4F24268NVRFQV Datasheet - Page 286
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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Section 6 Bus Controller (BSC)
6.8.7
CAS latency is controlled by settings of the W22 to W20 bits of WTCRB. Set the CAS latency
count, as shown in table 6.11, by the setting of synchronous DRAM. Depending on the setting, the
CAS latency control cycle (T
AST2 bit of ASTCR. Figure 6.57 shows the CAS latency control timing when synchronous
DRAM of CAS latency 3 is connected.
The initial value of W22 to W20 is H'7. Set the register according to the CAS latency of
synchronous DRAM to be connected.
Table 6.11 Setting CAS Latency
Page 256 of 1372
W22
0
1
CAS Latency Control
W21
0
1
0
1
W20
0
1
0
1
0
1
0
1
c1
) is inserted. WTCRB can be set regardless of the setting of the
Connect synchronous DRAM of CAS
latency 1
Connect synchronous DRAM of CAS
latency 2
Connect synchronous DRAM of CAS
latency 3
Connect synchronous DRAM of CAS
latency 4
Reserved (must not be used)
Reserved (must not be used)
Reserved (must not be used)
Reserved (must not be used)
Description
H8S/2426, H8S/2426R, H8S/2424 Group
CAS Latency Control
Cycle Inserted
0 state
1 state
2 states
3 states
⎯
⎯
⎯
⎯
REJ09B0466-0350 Rev. 3.50
Jul 09, 2010
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