Clock Module - Renesas M3A-HS49 User Manual

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2.5 Clock Module

The clock module in the M3A-HS49 consists of the following two blocks:
•
Output from a oscillator connected to EXTAL of the SH7149
•
Ceramic resonator connected to EXTAL and XTAL
The M3A-HS49 has a 10MHz oscillator connected to it as standard specification.
To connect an extension board to the extension connector, we recommend including a clock buffer that contains a
PLL to ensure that the board will be supplied with a stable clock signal.
Figure2.5.1 shows the block diagram of clock module.
Oscillator
CLK
*： To mount the ceramic oscillator, remove R9.
: Not mounted parts
Rev.1.0 Dec 15, 2006
REJ10J0917-0100
SH7149
*
R9
PA15/CK
EXTAL
XTAL
Ceramic Resonators
10MHz
Figure2.5.1 Block Diagram of Clock Module
Functional Overview
2.5 Clock Module
PA15/CK
(Extension connector)
2-7