DF2378BVFQ35V Renesas Electronics America, DF2378BVFQ35V Datasheet - Page 275

• Manufacturer Part Number: DF2378BVFQ35V
• Description: IC H8S/2378 MCU FLASH 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2378BVFQ35V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 35MHz
• Connectivity: I²C, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 97
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 6x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• For Use With: YLCDRSK2378 - KIT DEV EVAL H8S/2378 LCDYR0K42378FC000BA - KIT EVAL FOR H8S/2378HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)EDK2378 - DEV EVAL KIT FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

• RAS Up Mode
φ
Address bus
RASn (CSn)
UCAS, LCAS
RD
OE
Data bus
Note: n = 2 to 5
To select RAS up mode, clear the RCDM bit to 0 in DRAMCR. Each time access to DRAM
space is interrupted and another space is accessed, the RAS signal goes high again. Burst
operation is only performed if DRAM space is continuous. Figure 6.33 shows an example of
the timing in RAS up mode.
Figure 6.33 Example of Operation Timing in RAS Up Mode
T
Row address
p
DRAM space read
T
r
(RAST = 0, CAST = 0)
Column address 1 Column address 2
T
c1
T
c2
Rev.7.00 Mar. 18, 2009 page 207 of 1136
T
DRAM space
c1
read
Section 6 Bus Controller (BSC)
T
c2
External address
Normal space
T
1
REJ09B0109-0700
read
T
2