DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 170

• Manufacturer Part Number: DF2398TE20
• Description: IC H8S MCU FLASH 256K 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398TE20

• 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: 120-TQFP, 120-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2398TE20; HD64F2398TE20

6.5.6
Figure 6-15 shows the basic access timing for DRAM space. The basic DRAM access timing is 4 states. Unlike the basic
bus interface, the corresponding bits in ASTCR control only enabling or disabling of wait insertion, and do not affect the
number of access states. When the corresponding bit in ASTCR is cleared to 0, wait states cannot be inserted in the
DRAM access cycle.
The 4 states of the basic timing consist of one T
(column address output cycle) states, T
Rev.6.00 Oct.28.2004 page 140 of 1016
REJ09B0138-0600H
Basic Timing
Note: n = 2 to 5
Read
Write
CAS, LCAS
CSn, (RAS)
HWR, (WE)
HWR, (WE)
D
D
A
15
15
23
to D
to D
to A
ø
0
0
0
c1
and T
Figure 6-15 Basic Access Timing
c2
p
.
T
(precharge cycle) state, one T
p
Row
T
r
T
c1
r
(row address output cycle), and two T
Column
T
c2
c