HD6417751RF240V Renesas Electronics America, HD6417751RF240V Datasheet - Page 513

• Manufacturer Part Number: HD6417751RF240V
• Description: MPU 1.5/3.3V 0K PB-FREE 256-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417751RF240V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 240MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-QFP Exposed Pad, 256-eQFP, 256-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

13.3.4
Direct Connection of DRAM: When the memory type bits (DRAMTP2–0) in BCR1 are set to
100, area 3 becomes DRAM interface. The DRAM interface function can then be used to connect
DRAM to this LSI.
16 or 32 bits can be selected as the interface data width.
2-CAS 16-bit DRAMs can be connected, since CAS is used to control byte access.
Signals used for connection are CS3, RAS, CAS0 to CAS3, and RD/WR. CAS2 to CAS3 are not
used when the data width is 16 bits.
In addition to normal read and write access modes, fast page mode is supported for burst access.
EDO mode, which enables the DRAM access time to be increased, is supported.
DRAM Interface
SH7751/SH7751R
Figure 13.13 Example of DRAM Connection (32-Bit Data Width, Area 3)
RD/WR
CAS3
CAS2
CAS1
CAS0
RAS
CS3
D31
D16
D15
A10
D0
A2
Rev.4.00 Oct. 10, 2008 Page 413 of 1122
13. Bus State Controller (BSC)
256K × 16-bit
A8
A0
RAS
OE
WE
I/O15
I/O0
UCAS
LCAS
A8
A0
RAS
OE
WE
I/O15
I/O0
UCAS
LCAS
REJ09B0370-0400
DRAM