HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 623

• 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: -

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.
Damping resistance Rd should be selected according to table 19.1 (1), and external capacitances
C
If a crystal resonator with a frequency higher than 20 MHz is connected, the external load
capacitance values in table 19.1 (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)
Note: A crystal resonator between 2 MHz and 25 MHz can be used.
Table 19.1 (2)
Damping
Resistance
Value
Rd ( )
External Capacitance Value
Frequency f (MHz)
C
L1
L1
= C
and C
L2
(pF)
Oscillator Circuit
Connecting a Crystal Resonator
L2
according to table 19.1 (2). An AT-cut parallel-resonance crystal should be used.
2
1 k
Damping Resistance Value
External Capacitance Values
2
500
Figure 19.2 Connection of Crystal Resonator (Example)
f
4 4
200
f 8 8
EXTAL
XTAL
3.3 V Version
16
10 to 22
0
f
f
10 10
Rd
Frequency f (MHz)
25
0
f
Rev. 2.00 Sep 20, 2005 page 583 of 800
13 13
C
C
L1
L2
0
Section 19 Clock Pulse Generator
f
2
22
16 16
f
0
16
f
REJ09B0260-0200
18 18
0
f
25