HD6417750SF200V Renesas Electronics America, HD6417750SF200V Datasheet - Page 548

• Manufacturer Part Number: HD6417750SF200V
• Description: MPU 3V 16K PB-FREE 208-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7750r

Specifications of HD6417750SF200V

• Core Processor: SH-4
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, FIFO, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 28
• Program Memory Type: ROMless
• Ram Size: 24K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 2.07 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Section 13 Bus State Controller (BSC)
Rev.7.00 Oct. 10, 2008 Page 462 of 1074
REJ09B0366-0700
Figure 13.24 shows the timing of the CAS-before-RAS refresh cycle.
The number of RAS assert cycles in the refresh cycle is specified by bits TRAS2–TRAS0 in
MCR. The specification of the RAS precharge time in the refresh cycle is determined by the
setting of bits TRC2–TRC0 in MCR.
Figure 13.24 DRAM CAS-Before-RAS Refresh Cycle Timing (TRAS = 0, TRC = 1)
CKIO
A25–A0
CSn
RD/WR
RAS
CAS
D63–D0
BS
TRr1
TRr2
TRr3
TRr4
TRr5
Trc
Trc
Trc