DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 693

• Manufacturer Part Number: DF2357F20
• Description: IC H8S MCU FLASH 5V 128K 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2357F20

• 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: 128KB (128K 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
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

20.3
Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock.
20.3.1
Circuit Configuration: A crystal resonator can be connected as shown in the example in figure 20-2. Select the damping
resistance R
Table 20-2 Damping Resistance Value
Crystal Resonator: Figure 20-3 shows the equivalent circuit of the crystal resonator. Use a crystal resonator that has the
characteristics shown in table 20-3 and the same resonance frequency as the system clock (ø).
Table 20-3 Crystal Resonator Parameters
Oscillator
Connecting a Crystal Resonator
d
Frequency (MHz)
R
Frequency (MHz)
R
C
according to table 20-2. An AT-cut parallel-resonance crystal should be used.
d
S
0
( )
max (pF)
max ( )
Figure 20-2 Connection of Crystal Resonator (Example)
XTAL
EXTAL
XTAL
Figure 20-3 Crystal Resonator Equivalent Circuit
2
1k
2
500
7
R
d
L
4
500
4
120
7
C
C
C
C
L
0
L1
L2
AT-cut parallel-resonance type
8
200
8
80
7
R
s
C
10
0
10
70
7
L1
= C
EXTAL
L2
= 10 to 22 pF
12
0
12
60
7
Rev.6.00 Oct.28.2004 page 663 of 1016
16
0
16
50
7
20
0
20
40
7
REJ09B0138-0600H