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HD64F2149YV Datasheet(PDF) 356 Page - Renesas Technology Corp

Part # HD64F2149YV
Description  Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series
PDF  1075 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD64F2149YV Datasheet(HTML) 356 Page - Renesas Technology Corp

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Section 11 16-Bit Free-Running Timer
Rev. 3.00 Jan 18, 2006 page 328 of 1044
REJ09B0280-0300
External Clock: If external clock input is selected by bits CKS1 and CKS0 in TCR, FRC
increments on the rising edge of the external clock signal.
The pulse width of the external clock signal must be at least 1.5 system clock (
φ) periods. The
counter will not increment correctly if the pulse width is shorter than 1.5 system clock periods.
Figure 11.4 shows the increment timing.
N + 1
N
FRC input
clock
φ
FRC
External
clock input pin
Figure 11.4 Increment Timing with External Clock Source



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