R5F61665N50FPV Renesas Electronics America, R5F61665N50FPV Datasheet - Page 316

• 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)
9.10.8
The number of precharge cycles (Tp) can be selected from one to four clock cycles by bits TPC1
and TPC0 in DRACCR. Set the bit according to the DRAM to be used and the frequency of this
LSI so that the number of precharge cycle can be optimal.
Figure 9.42 shows an access timing example when two Tp cycles are specified.
The setting of bits TPC1 and TPC0 affect the Tp cycle of a refresh cycle.
Rev. 2.00 Oct. 21, 2009 Page 282 of 1454
REJ09B0498-0200
Figure 9.42 Access Timing Example of Two Precharge Cycles (RAST = 0 and CAST = 0)
Controlling Precharge Cycle
Read
Write
Address bus
Data bus
Data bus
OE (RD)
OE (RD)
RD/WR
LUCAS
LLCAS
RAS
WE
WE
Bφ
BS
T
p1
Row address
T
p2
High
High
T
r
Column address
T
c1
T
c2