US38024-BAG1 Renesas Electronics America, US38024-BAG1 Datasheet - Page 133

• Manufacturer Part Number: US38024-BAG1
• Description: DEV EVALUATION KIT H8/38024
• Manufacturer: Renesas Electronics America
• Series: H8®r
• Type: MCUr

Specifications of US38024-BAG1

• Contents: 2G (Second-generation) Evaluation Board, HEW debugger support, Cable and CD-ROM
• For Use With/related Products: H8/38024
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

4.3
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 4.8. Follow the same precautions as noted under 3. notes on board
design for the system clock in section 4.2.
Note that only operation at 32.768 kHz is guaranteed on the H8/38124 Group.
Figure 4.9 shows the equivalent circuit of the 32.768 kHz/38.4 kHz crystal oscillator.
Figure 4.8 Typical Connection to 32.768 kHz/38.4 kHz Crystal Oscillator (Subclock)
X
X
1
2
Subclock Generator
Figure 4.9 Equivalent Circuit of 32.768 kHz/38.4 kHz Crystal Oscillator
X
1
C
C
1
2
Notes: Circuit constants should be detemined in consultation with the
L
Frequency
38.4 kHz
32.768 kHz
Frequency
32.768 kHz*
S
C = C
C = C
resonator manufacture.
* H8/38124 Group only.
1
1
2
2
C
= 15 pF (typ.)
= 7 pF (typ.)
Crystal oscillator
Seiko Instruments Inc.
Nihon Denpa Kogyo
S
Crystal oscillator
EPSON TOYOCOM.
C
0
Rev. 8.00 Mar. 09, 2010 Page 111 of 658
C = 1.5 pF typ
R = 14 k
f
W
0
S
= 32.768 kHz/38.4 kHz
R
Section 4 Clock Pulse Generators
S
Products Name
C-001R
Products Name
VTC-200
MX73P
Ω
typ
REJ09B0042-0800
Motion Resistance
35 kΩ max
X
2