hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 158

• Manufacturer Part Number: hd64338342hw
• Description: Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Section 4 Clock Pulse Generators
4.3
1. Connecting a 32.768 kHz/38.4 kHz Crystal Oscillator
Clock pulses can be supplied to the subclock divider by connecting a 32.768 kHz/38.4 kHz crystal
oscillator, as shown in figure 4.6. Follow the same precautions as noted under 3. notes on board
design for the system clock in section 4.2.
Figure 4.7 shows the equivalent circuit of the 32.768 kHz/38.4 kHz crystal oscillator.
Rev. 6.00 Aug 04, 2006 page 122 of 680
REJ09B0145-0600
Figure 4.6 Typical Connection to 32.768 kHz/38.4 kHz Crystal Oscillator (Subclock)
The circuit parameters are affected by the crystal or ceramic oscillator and floating
capacitance when designing the board. When using the oscillator, consult with the crystal
or ceramic oscillator manufacturer to determine the circuit parameters.
Subclock Generator
Figure 4.7 Equivalent Circuit of 32.768 kHz/38.4 kHz Crystal Oscillator
X
1
Note: Circuit constants should be determined in consultation
Oscillation frequency Manufacturer
38.4 kHz
32.768 kHz
with the resonator manufacturer.
X
X
1
2
L
S
Seiko Instrument Inc.
Nihon Denpa Kogyo
C
C
C
1
2
S
C
0
C = C
1
C = 1.5 pF typ
R = 14 k
f
W
0
S
2
= 32.768 kHz/38.4kHz
R
= 15 pF (typ.)
Products Name
VTC-200
MX73P
S
typ
X
2