R5F61665N50FPV Renesas Electronics America, R5F61665N50FPV Datasheet - Page 360

• Manufacturer Part Number: R5F61665N50FPV
• Description: MCU FLASH 512K ROM 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61665N50FPV

• Core Processor: H8SX
• Core Size: 16/32-Bit
• Speed: 50MHz
• Connectivity: EBI/EMI, I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 92
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 9 Bus Controller (BSC)
When the time between the REF command and the subsequent ACTV command does not meet a
given specification, a wait cycle can be inserted for one to seven cycles during a refresh cycle by
bits RLW2 to RLW0 in REFCR. Set the bit according to the SDRAM to be used and the
frequency of this LSI so that the number of wait cycles can be optimal.
Figure 9.78 shows a timing example when the one wait cycle is inserted.
Rev. 2.00 Oct. 21, 2009 Page 326 of 1454
REJ09B0498-0200
Figure 9.78 Auto-Refresh Timing (TPC1 = 0, TPC0 = 0, RLW2 = 0, RLW1 = 0, RLW0 = 1)
Precharge-sel
Address bus
SDRAMφ
RD/WR
RAS
CAS
CKE
WE
CS
BS
PALL
TR
p
REF
TR
r
High
High
High
TR
c1
TR
NOP
cw
TR
c2