HD64F2676VFC33 Renesas Electronics America, HD64F2676VFC33 Datasheet - Page 263

• Manufacturer Part Number: HD64F2676VFC33
• Description: IC H8S MCU FLASH 256K 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2676VFC33

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 33MHz
• Connectivity: IrDA, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 103
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

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.
Upper data bus
Lower data bus
Precharge-sel
Address bus
Byte Access Control
SDRAM
DQMU
DQML
CKE
RAS
CAS
WE
(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
Rev. 3.00 Mar 17, 2006 page 211 of 926
Column address
WRIT
High-Z
T
Section 6 Bus Controller (BSC)
cl
NOP
T
c2
REJ09B0283-0300