DF2398TE20 Renesas Electronics America, DF2398TE20 Datasheet - Page 695

• 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

Table 20-4 and figure 20-6 show the input conditions for the external clock.
Table 20-4 External Clock Input Conditions
20.4
When the oscillator frequency is 5 MHz or higher, the duty adjustment circuit adjusts the duty cycle of the clock signal
from the oscillator to generate the system clock (ø).
20.5
The medium-speed clock divider divides the system clock to generate ø/2, ø/4, ø/8, ø/16, and ø/32.
20.6
The bus master clock selection circuit selects the system clock (ø) or one of the medium-speed clocks (ø/2, ø/4, or ø/8,
ø/16, and ø/32) to be supplied to the bus master, according to the settings of the SCK2 to SCK0 bits in SCKCR.
Duty Adjustment Circuit
Medium-Speed Clock Divider
Bus Master Clock Selection Circuit
Item
External clock input
low pulse width
External clock input
high pulse width
External clock rise time
External clock fall time
Clock low pulse width
level
Clock high pulse width
level
EXTAL
t
EXr
Symbol
t
t
t
t
t
t
EXL
EXH
EXr
EXf
CL
CH
Figure 20-6 External Clock Input Timing
V
to 5.5 V
Min
40
40
—
—
0.4
80
0.4
80
CC
t
= 2.7 V
EXH
Max
—
—
10
10
0.6
—
0.6
—
Min
20
20
—
—
0.4
80
0.4
80
V
10%
CC
= 5.0 V
Max
—
—
5
5
0.6
—
0.6
—
t
EXf
t
EXL
Unit
ns
ns
ns
ns
t
ns
t
ns
cyc
cyc
Rev.6.00 Oct.28.2004 page 665 of 1016
Test
Conditions
Figure 20-6
ø
ø < 5 MHz
ø
ø < 5 MHz
5 MHz
5 MHz
V
CC
0.5
Figure 22-4
REJ09B0138-0600H