R5F61668RN50FPV Renesas Electronics America, R5F61668RN50FPV Datasheet - Page 317

• Manufacturer Part Number: R5F61668RN50FPV
• Description: IC H8SX/1668 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of R5F61668RN50FPV

• 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: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 56K 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
• For Use With: R0K561668S000BE - KIT STARTER FOR H8SX/1668R0K561664S001BE - KIT STARTER FOR H8SX/1651HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

9.10.6
The number of column address output cycles can be changed from two to three clock cycles by
setting the CAST bit in DRAMCR. Set the bit according to the DRAM to be used and the
frequency of this LSI so that the CAS pulse width can be optimal.
Figure 9.39 shows a timing example when the number of column address output cycles is set to
three clock cycles.
Figure 9.39 Access Timing Example of Column Address Output Cycles for 3 Clock Cycles
Controlling Column Address Output Cycle
Read
Write
Address bus
OE (RD)
Data bus
OE (RD)
Data bus
RD/WR
LUCAS
LLCAS
RAS
WE
WE
BS
Bφ
T
p
Row address
(RAST = 0)
T
r
High
High
T
c1
Rev. 2.00 Sep. 24, 2008 Page 283 of 1468
Column address
T
c2
Section 9 Bus Controller (BSC)
T
c3
REJ09B0412-0200