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Functional Specifications

2.8 Clock Modules

Rev.1.00

Oct 09, 2008 2-12

REJ11J0021-0100

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

*: When mounting the oscillator, remove R7 and the crystal oscillation circuit.

Crystal oscillation circuit

Figure 2.8.1 Clock Module Block Diagram

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 63 64

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