HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 624

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 19 Clock Pulse Generator
Crystal Resonator: Figure 19.3 shows an equivalent circuit of the crystal resonator. The crystal
resonator should have the characteristics listed in table 19.2.
Table 19.2 Crystal Resonator Parameters
Use a crystal resonator with a frequency equal to the system clock frequency ( ).
Notes on Board Design: When a crystal resonator is connected, the following points should be
noted:
Other signal lines should be routed away from the oscillator circuit to prevent induction from
interfering with correct oscillation. See figure 19.4.
When the board is designed, the crystal resonator and its load capacitors should be placed as close
as possible to the XTAL and EXTAL pins.
Rev. 2.00 Sep 20, 2005 page 584 of 800
REJ09B0260-0200
Frequency (MHz)
Rs max ( )
Co (pF)
XTAL
Figure 19.4 Oscillator Circuit Block Board Design Precautions
Avoid
C
C
Figure 19.3 Crystal Resonator Equivalent Circuit
L2
L1
2
500
L
4
120
Signal A
8
80
C
L
10
70
Signal B
C
0
7 pF max
12
60
AT-cut parallel-resonance type
Rs
XTAL
EXTAL
16
50
H8/3024 Group
18
40
20
40
EXTAL
25
40