DF2378BVFQ35WV Renesas Electronics America, DF2378BVFQ35WV Datasheet - Page 296

• Manufacturer Part Number: DF2378BVFQ35WV
• Description: IC H8S/2378 MCU FLASH 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2378BVFQ35WV

• 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: -40°C ~ 85°C
• Package / Case: 144-QFP
• For Use With: EDK2378 - DEV EVAL KIT FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 6 Bus Controller (BSC)
6.7.11
When synchronous DRAM with a ×16-bit configuration is connected, DQMU and DQML are
used for the control signals needed for byte access.
Figures 6.49 and 6.50 show the control timing for DQM, and figure 6.51 shows an example of
connection of byte control by DQMU and DQML.
Rev.7.00 Mar. 18, 2009 page 228 of 1136
REJ09B0109-0700
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 6.49 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
cl
NOP
T
c2