DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 639

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K 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: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

19.2
Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock
signal.
19.2.1
Circuit Configuration: A crystal resonator can be connected as in the example in figure 19.2.
The damping resistance Rd should be selected according to table 19.1 (1). Use capacitors with the
characteristics listed in table 19.1 (2) for external capacitors C
resonance crystal should be used.
If a crystal resonator with a frequency higher than 20 MHz is connected,the external load
capacitance values in table 20.1 (2) should not exceed 10[pF] Also,in order to improve the
accuracy of the oscillation frequency a thorough study of oscillation matching evaluation etc.
should be carried out when deciding the circuit constants.
Table 19.1 (1)
Damping
Resistance
Value
Rd ( )
Note: A crystal resonator between 2 MHz and 25 MHz can be used. If the chip is to be operated
at less than 2 MHz, the on-chip frequency divider should be used. (A crystal resonator of
less than 2 MHz cannot be used.)
Oscillator Circuit
Connecting a Crystal Resonator
2
1 k 1 k
2
Damping Resistance Value
Figure 19.2 Connection of Crystal Resonator (Example)
f
4 4
EXTAL
XTAL
500
f
8 8
Rd
200
f
10 10
100
C
C
Frequency f (MHz)
L1
L2
f
13 13
0
Rev. 3.00 Mar 21, 2006 page 609 of 814
f
L1
16 16
Section 19 Clock Pulse Generator
and C
0
L2
f
. An AT-cut parallel-
18 18
0
REJ09B0302-0300
f
25 20
0
f
25