DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 690

• Manufacturer Part Number: DF2148BTE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BTE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K 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: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2148BTE20; HD64F2148BTE20

Section 24 Clock Pulse Generator
24.1
Clock pulses can be supplied either by connecting a crystal resonator, or by providing external
clock input.
24.1.1
Figure 24.2 shows a typical method of connecting a crystal resonator. An appropriate damping
resistance R
should be used.
Figure 24.3 shows the equivalent circuit of a crystal resonator. A resonator having the
characteristics given in table 24.2 should be used.
A crystal resonator with frequency identical to that of the system clock ( ) should be used.
Table 24.1 Damping Resistance Values
Frequency (MHz)
R
Rev. 3.00 Mar 21, 2006 page 634 of 788
REJ09B0300-0300
d
( )
Oscillator
Connecting Crystal Resonator
d
, given in table 24.1, should be used. An AT-cut parallel-resonance crystal resonator
XTAL
Figure 24.2 Typical Connection to Crystal Resonator
Figure 24.3 Equivalent Circuit of Crystal Resonator
2
1 k
EXTAL
XTAL
L
R
4
500
d
C
C
L
0
C
C
AT-cut parallel-resonance crystal resonator
L1
L2
8
200
R
s
EXTAL
10
0
C
L1
= C
L2
= 10 to 22 pF
12
0
16
0
20
0