D12332VFC20V Renesas Electronics America, D12332VFC20V Datasheet - Page 210

• Manufacturer Part Number: D12332VFC20V
• Description: IC H8S/2332 MCU ROMLESS 144QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12332VFC20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 106
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 144-QFP
• For Use With: EDK2329 - DEV EVALUATION KIT H8S/2329
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

• RAS up mode
Rev.4.00 Sep. 07, 2007 Page 178 of 1210
REJ09B0245-0400
A
CS
CAS, LCAS
D
Note: n = 2 to 5
To select RAS up mode, clear the RCDM bit in MCR to 0. Each time access to DRAM space
is interrupted and another space is accessed, the RAS signal goes high again. Burst operation is
only performed if DRAM space is continuous. Figure 6.22 shows an example of the timing in
RAS up mode. Note that in burst ROM space access, the RAS signal does not return to the
high level.
φ
23
15
n
to A
to D
(RAS)
0
0
Figure 6.22 Example of Operation Timing in RAS Up Mode
T
p
DRAM access
T
r
T
c1
T
c2
DRAM access
T
c1
T
c2
space access
T
External
1
T
2