Clock Module - Renesas M3A-HS60 User Manual

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2.7 Clock Module

The clock module in the M3A-HS60 consists of the following two blocks:
• Output from a oscillator connected to EXTAL of the SH7206
• Ceramic resonator connected to EXTAL and XTAL
The M3A-HS60 has a 16.67MHz oscillator connected. Furthermore, the bus clock output from the SH7206 is connected
to the SDRAM via a damping resistor. 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.
Figure2.7.1 shows a block diagram of clock module.
Oscillator
R18
CLK
Ceramic
Resonator
Not mounted
*1:To mount ceramic resonator, remove the resistor 18
*2:To mount a clock buffer, remove the resistor 14
:Not mounted parts
Rev.1.00 June 1,2005
REJ11J0002-0100Z
SH7206
EXTAL CKIO
XTAL
R82
*1
CSTCE-G16M67(Murata)
Figure2.7.1 Block Diagram of Clock Module
R14
Clock Buffer
Not mounted
*2
CY2305SC-1H(Cypress)
CLKIH(SDRAM upper bytes)
CLKIL(SDRAM lower bytes)
Functional Overview
2.7 Clock Module
EXCLK(Extension connector)
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