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Section 4 Clock Pulse Generator (CPG)
Rev. 4.00 Sep. 14, 2005 Page 152 of 982
REJ09B0023-0400
4.6
Notes on Board Design
Note on Using an External Crystal Resonator: Place the crystal resonator, capacitors CL1 and
CL2, and feedback resistor R1 as close to the XTAL and EXTAL pins as possible. In addition, to
minimize induction and thus obtain oscillation at the correct frequency, the capacitors to be
attached to the resonator must be grounded to the same ground. Do not bring wiring patterns close
to these components.
Signal lines prohibited
CL1
CL2
EXTAL
XTAL
This LSI
Rl
The values for CL1, CL2, and
the damping resistance RI
should be determined after
consultation with the crystal
resonator manufacturer.
Note:
Reference value
CL1 = 10 to 33 pF
CL2 = 10 to 33 pF
Rl = 1M
Ω
Figure 4.2 Note on Using a Crystal Resonator
Notes on Using External Clocks: When external clocks are input from the EXTAL pin, leave the
XTAL pin open. In order to prevent a malfunction due to the reflection noise caused in a signal
line which connected to XTAL pin, cut this signal line as short as possible.
Notes on Bypass Capacitor: A multilayer ceramic capacitor must be inserted for each pair of Vss
and Vcc as a bypass capacitor. The bypass capacitor must be inserted as close as possible to the
power supply pins of the LSI. Note that the capacitance and frequency characteristics of the
bypass capacitor must be appropriate for the operating frequency of the LSI.
•
A pair of Vss and VCC for the input/output power supply
C1 to D1, M4 to M3, V1 to W1, U7 to V7, U12 to V12, Y18 to Y19, M19 to M18, H17 to
H18, C20 to B20, A18 to A17, D14 to C14, D13 to C13, D8 to C8, A3 to A2
•
A pair of Vss and Vcc for the digital modules
F3 to F4, K3 to K4, U4 to T4, V6 to U6, V10 to U10, U17 to U16, R18 to R17, L18 to L17,
D17 to E17, C15 to D15, C11 to D11, D4 to D5
•
A pair of Vss and Vcc for the on-chip oscillator
K20 to K17, K18 to J20
Содержание HD6417641
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Страница 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Страница 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Страница 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Страница 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
Страница 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Страница 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Страница 734: ...Section 18 Multi Function Timer Pulse Unit MTU Rev 4 00 Sep 14 2005 Page 684 of 982 REJ09B0023 0400...
Страница 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Страница 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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Страница 1036: ...SH7641 Hardware Manual...