DF2398F20V Renesas Electronics America, DF2398F20V Datasheet - Page 173

• Manufacturer Part Number: DF2398F20V
• Description: IC H8S/2300 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398F20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 128-QFP
• For Use With: YR0K42378FC000BA - KIT EVAL FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

6.5.9
When DRAM with a 16 configuration is connected, the 2-CAS system can be used for the control signals required for
byte access.
When the CW2 bit is cleared to 0 in MCR, the 2-CAS system is selected. Figure 6-18 shows the control timing in the 2-
CAS system, and figure 6-19 shows an example 2-CAS system DRAM connection.
When only DRAM with a 8 configuration is connected, set the CW2 bit to 1 in MCR.
Byte Access Control
Byte control
Note: n = 2 to 5
Figure 6-18 2-CAS System Control Timing (Upper Byte Write Access)
(Address shift size set to 9 bits)
CSn, (RAS)
HWR, (WE)
A
23
H8S/2357 Group
LCAS
Figure 6-19 Example of 2-CAS System Connection
to A
CAS
ø
0
HWR, (WE)
CS, (RAS)
D
15
LCAS
to D
CAS
T
A
A
A
A
A
A
A
A
A
p
9
8
7
6
5
4
3
2
1
0
Row
T
r
256-kbyte x 16-bit configuration
RAS
UCAS
LCAS
WE
A
A
A
A
A
A
A
A
A
D
8
7
6
5
4
3
2
1
0
15
2-CAS type 4-Mbit DRAM
to D
T
9-bit column address
c1
0
Low address
input: A
Column address
input: A
Column
OE
Rev.6.00 Oct.28.2004 page 143 of 1016
8
8
to A
to A
T
0
0
c2
REJ09B0138-0600H