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Functional Specifications
2.8 Clock Modules
Rev.1.00
Oct 09, 2008 2-12
REJ11J0021-0100
2
2.8 Clock Modules
The M3A-HS37 clock modules consists of two blocks.
- Crystal resonator is connected to EXTAL and XTAL
- Output from the oscillator is connected to the SH7137 EXTAL
The M3A-HS37 comes standard with a 10.0 MHz crystal resonator.
When mounting the oscillator, remove R7 and the crystal oscillation circuit.
Figure 2.8.1 shows the clock module block diagram.
CLK
Oscillator
SH7137
EXTAL
XTAL
PA15/CK/TXD1/SSO
Crystal oscillator
10.0 MHz
Expansion connector
(J9, pin 23)
：optional
R7
*
*
*: When mounting the oscillator, remove R7 and the crystal oscillation circuit.
0
0
Crystal oscillation circuit
Figure 2.8.1 Clock Module Block Diagram