R4F24269NVFQV Renesas Electronics America, R4F24269NVFQV Datasheet - Page 292

• Manufacturer Part Number: R4F24269NVFQV
• Description: MCU 256KB FLASH 64K 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2400r

Specifications of R4F24269NVFQV

• 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: 64K 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: -

Section 6 Bus Controller (BSC)
6.8.11
When synchronous DRAM with a ×16-bit configuration is connected, DQMU and DQML are
used for the control signals needed for byte access.
Figures 6.61 and 6.62 show the control timing for DQM, and figure 6.63 shows an example of
connection of byte control by DQMU and DQML.
Page 262 of 1372
Upper data bus
Lower data bus
Precharge-sel
Address bus
Byte Access Control
SDRAMφ
DQMU
DQML
CKE
RAS
CAS
WE
φ
(Upper Byte Write Access: SDWCD = 0, CAS Latency 2)
Figure 6.61 DQMU and DQML Control Timing
Column address
PALL
T
p
Row address
Row address
ACTV
T
r
High
High
NOP
T
c1
High impedance
Column address
WRIT
T
H8S/2426, H8S/2426R, H8S/2424 Group
cl
REJ09B0466-0350 Rev. 3.50
NOP
T
c2
Jul 09, 2010