DF2378BVFQ35V Renesas Electronics America, DF2378BVFQ35V Datasheet - Page 273
![IC H8S/2378 MCU FLASH 144-LQFP](/photos/12/29/122922/df2378bvfq35v_sml.jpg)
DF2378BVFQ35V
Manufacturer Part Number
DF2378BVFQ35V
Description
IC H8S/2378 MCU FLASH 144-LQFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2300r
Specifications of DF2378BVFQ35V
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
-20°C ~ 75°C
Package / Case
144-LQFP
For Use With
YLCDRSK2378 - KIT DEV EVAL H8S/2378 LCDYR0K42378FC000BA - KIT EVAL FOR H8S/2378HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)EDK2378 - DEV EVAL KIT FOR H8S/2378
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Part Number:
DF2378BVFQ35V
Manufacturer:
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The bus cycle can also be extended in burst access by inserting wait states. The wait state insertion
method and timing are the same as for full access. For details see section 6.6.9, Wait Control.
RAS Down Mode and RAS Up Mode: Even when burst operation is selected, it may happen that
access to DRAM space is not continuous, but is interrupted by access to another space. In this
case, if the RAS signal is held low during the access to the other space, burst operation can be
resumed when the same row address in DRAM space is accessed again.
• RAS Down Mode
Note: n = 2 to 5
Read
Write
To select RAS down mode, set both the RCDM bit and the BE bit to 1 in DRAMCR. If access
to DRAM space is interrupted and another space is accessed, the RAS signal is held low
during the access to the other space, and burst access is performed when the row address of the
next DRAM space access is the same as the row address of the previous DRAM space access.
Figure 6.32 shows an example of the timing in RAS down mode.
Note, however, that the RAS signal will go high if:
φ
Address bus
RASn (CSn)
UCAS, LCAS
WE (HWR)
OE (RD)
Data bus
WE (HWR)
OE (RD)
Data bus
Figure 6.31 Operation Timing in Fast Page Mode
T
Row address
p
T
r
(RAST = 0, CAST = 1)
High
High
T
c1
Column address 1
T
c2
Rev.7.00 Mar. 18, 2009 page 205 of 1136
T
c3
Section 6 Bus Controller (BSC)
T
c1
Column address 2
REJ09B0109-0700
T
c2
T
c3
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