DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 660

• Manufacturer Part Number: DF3048BVX25V
• Description: MCU 3/5V 128K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048BVX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: Lead free / RoHS 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 19.3.
Table 19.3 Crystal Resonator Parameters
Frequency (MHz)
Rs max ( )
C
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. 3.00 Sep 27, 2006 page 632 of 872
REJ09B0325-0300
0
XTAL
max (pF)
Figure 19.3 Crystal Resonator Equivalent Circuit
500
2
L
120
4
C
80
8
L
10
70
C
0
12
60
7
AT-cut parallel-resonance type
Rs
16
50
18
40
20
40
EXTAL
25
40