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M16C/1N датащи(PDF) 35 Page - Renesas Technology Corp |
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M16C/1N датащи(HTML) 35 Page - Renesas Technology Corp |
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35 / 238 page ![]() Rev.1.00 Oct 20, 2004 page 23 of 222 M16C/1N Group 6. Clock Generation Circuit REJ09B0007-0100Z Main clock oscillation circuit Sub clock oscillation circuit On-chip oscillator circuit Use of clock • CPU’s operating clock source • CPU’s operating clock source • CPU’s operating clock source • Internal peripheral unit’s • Timer 1/X/Y/Z’s count • Internal peripheral unit’s operating clock source clock source operating clock source • Timer Y’s count clock source Usable oscillator • Ceramic oscillator • Crystal oscillator – connectable (Note 1) • Crystal oscillator Oscillator connect pins XIN, XOUT XCIN, XCOUT None (has internal pins) Oscillation stop/restart function Available Available Available Oscillator status immediately Oscillating Stopped Oscillating after reset Other Externally generated clock can be input – 6. Clock Generation Circuit The clock regeneration circuit contains three circuits as follows: - Main clock oscillation circuit - Sub clock oscillation circuit - On-chip oscillator Table 6.1 lists Clock Generation Circuit Specifications. Figure 6.1 shows a Clock Generation Circuit. Figure 6.2, 6.3 and 6.5 show clock-associated registers. Figure 6.4 shows fC32 block diagram. Table 6.1 Main clock, sub-clock, and on-chip oscillator circuits Note 1: When not using the main clock generating circuit, pull up the XIN pin and leave the XOUT pin open. Also, set the main clock stop bit (bit 5 at address 000616) to "1" (stop). |
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