DF2378BVFQ35WV Renesas Electronics America, DF2378BVFQ35WV Datasheet - Page 329

• Manufacturer Part Number: DF2378BVFQ35WV
• Description: IC H8S/2378 MCU FLASH 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2378BVFQ35WV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 35MHz
• Connectivity: I²C, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 97
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-QFP
• For Use With: EDK2378 - DEV EVAL KIT FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

• Normal space access after DRAM space write access
Idle Cycle in Case of Normal Space Access after Continuous Synchronous DRAM Space
Access:
Note: In the H8S/2378 Group, the synchronous DRAM interface is not supported.
• Normal space access after a continuous synchronous DRAM space read access
While the ICIS2 bit is set to 1 in BCR and a normal space read access occurs after DRAM
space write access, idle cycle is inserted in the first read cycle. The number of states of the idle
cycle to be inserted is in accordance with the setting of the IDLC bit. It does not depend on the
DRMI bit in DRACCR. Figure 6.78 shows an example of idle cycle operation when the ICIS2
bit is set to 1.
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
UCAS, LCAS
Address bus
Figure 6.78 Example of Idle Cycle Operation after DRAM Write Access
HWR, LWR
Data bus
RAS
RD
φ
(IDLC = 0, ICIS1 = 0, RAST = 0, CAST = 0)
T
p
DRAM space read
T
r
T
c1
T
c2
Idle cycle
T
i
External space read
Rev.7.00 Mar. 18, 2009 page 261 of 1136
T
1
T
2
Section 6 Bus Controller (BSC)
T
3
DRAM space read
T
c1
REJ09B0109-0700
T
c2