D12674RVFQ33D Renesas Electronics America, D12674RVFQ33D Datasheet - Page 256

• 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)
6.7.7
CAS latency is controlled by settings of the W22 to W20 bits of WTCRB. Set the CAS latency
count, as shown in table 6.10, by the setting of synchronous DRAM. Depending on the setting, the
CAS latency control cycle (T
AST2 bit of ASTCR. Figure 6.45 shows the CAS latency control timing when synchronous
DRAM of CAS latency 3 is connected.
The initial value of W22 to W20 is H'7. Set the register according to the CAS latency of
synchronous DRAM to be connected.
Table 6.10 Setting CAS Latency
W22
0
1
Rev. 3.00 Mar 17, 2006 page 204 of 926
REJ09B0283-0300
CAS Latency Control
W21
0
1
0
1
W20
0
1
0
1
0
1
0
1
c1
Description
Connect synchronous DRAM of
CAS latency 1
Connect synchronous DRAM of
CAS latency 2
Connect synchronous DRAM of
CAS latency 3
Connect synchronous DRAM of
CAS latency 4
Reserved (must not used)
Reserved (must not used)
Reserved (must not used)
Reserved (must not used)
) is inserted. WTCRB can be set regardless of the setting of the
CAS Latency Control Cycle
Inserted
0 state
1 state
2 states
3 states
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