D12674RVFQ33D Renesas Electronics America, D12674RVFQ33D Datasheet - Page 271

• Manufacturer Part Number: D12674RVFQ33D
• Description: MCU 3V 0K I-TEMP 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of D12674RVFQ33D

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 33MHz
• Connectivity: IrDA, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 103
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: HD6412674RVFQ33D; HD6412674RVFQ33D

Section 6 Bus Controller (BSC)
When the interval specification from the PLL command to the REF command cannot be satisfied,
setting the RCW1 and RCW0 bits of REFCR enables one to three wait states to be inserted after
the T
cycle that is set by the TPC1 and TPC0 bits of DRACCR. Set the optimum number of
Rp
waits according to the synchronous DRAM connected and the operating frequency of this LSI.
Figure 6.55 shows the timing when one wait state is inserted. Since the setting of bits TPC1 and
TPC0 of DRACCR is also valid in refresh cycles, the command interval can be extended by the
RCW1 and RCW0 bits after the precharge cycles.
T
T
T
T
T
T
Rp1
Rp2
Rrw
Rr
Rc1
Rc2
SDRAM
Address bus
Precharge-sel
RAS
CAS
WE
CKE
High
PALL
NOP
REF
NOP
Figure 6.55 Auto Refresh Timing
(TPC = 1, TPC0 = 1, RCW1 = 0, RCW0 = 1)
Rev. 3.00 Mar 17, 2006 page 219 of 926
REJ09B0283-0300