D12674RVFQ33D Renesas Electronics America, D12674RVFQ33D Datasheet - Page 295

• 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)
DRAM space read
External space read
DRAM space read
T
T
T
T
T
T
T
T
T
T
p
r
c1
c2
i
1
2
3
c1
c2
Address bus
RD
HWR, LWR
RAS
UCAS, LCAS
Data bus
Idle cycle
Figure 6.78 Example of Idle Cycle Operation after DRAM Write Access
(IDLC = 0, ICIS1 = 0, RAST = 0, CAST = 0)
Idle Cycle in Case of Normal Space Access After Continuous Synchronous DRAM Space
Access:
Note: In the H8S/2678 Group, the synchronous DRAM interface is not supported.
Normal space access after a continuous synchronous DRAM space read access
While the DRMI bit is cleared to 0 in DRACCR, idle cycle insertion after continuous synchronous
DRAM space read access is disabled. Idle cycle insertion after continuous synchronous DRAM
space read access can be enabled by setting the DRMI bit to 1. The conditions and number of
states of the idle cycle to be inserted are in accordance with the settings of bits ICIS1, ICIS0, and
IDLC in RCR. Figure 6.79 shows an example of idle cycle operation when the DRMI bit is set to
1. When the DRMI bit is cleared to 0, an idle cycle is not inserted after continuous synchronous
DRAM space read access even if bits ICIS1 and ICIS0 are set to 1.
Rev. 3.00 Mar 17, 2006 page 243 of 926
REJ09B0283-0300