HD64F2168VTE33 Renesas Electronics America, HD64F2168VTE33 Datasheet - Page 764

• Manufacturer Part Number: HD64F2168VTE33
• Manufacturer: Renesas Electronics America

Specifications of HD64F2168VTE33

• Cpu Family: H8S
• Device Core Size: 16/32Bit
• Frequency (max): 33MHz
• Interface Type: I2C/IrDA/SCI
• Program Memory Type: Flash
• Program Memory Size: 256KB
• Total Internal Ram Size: 40KB
• # I/os (max): 106
• Number Of Timers - General Purpose: 5
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• On-chip Adc: 8-chx10-bit
• On-chip Dac: 2-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -20C to 75C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: TQFP
• Lead Free Status / Rohs Status: Not Compliant

22.1
Clock pulses can be supplied either by connecting a crystal resonator or by providing external
clock input.
22.1.1
Figure 22.2 shows a typical method of connecting a crystal resonator. An appropriate damping
resistance R
should be used.
Figure 22.3 shows the equivalent circuit of a crystal resonator. A crystal resonator having the
characteristics given in table 22.2 should be used.
When PFSEL is high, the system clock (φ) frequency should be no more than 25 MHz and a
crystal resonator with frequency identical to that of the system clock (φ) should be used. When
PFSEL is low, a crystal resonator with ¼ times the frequency of the system clock (φ) should be
used.
Table 22.1 Damping Resistance Values
Frequency (MHz)
R
Rev. 3.00, 03/04, page 722 of 830
d
(Ω)
Oscillator
Connecting Crystal Resonator
d
, given in table 22.1, should be used. An AT-cut parallel-resonance crystal resonator
XTAL
Figure 22.2 Typical Connection to Crystal Resonator
Figure 22.3 Equivalent Circuit of Crystal Resonator
5
300
EXTAL
XTAL
L
R
8
200
d
C
C
L
0
C
C
AT-cut parallel-resonance crystal resonator
L1
L2
10
0
R
s
EXTAL
12
0
C
L1
= C
L2
= 10 to 22 pF
16
0
20
0
25
0