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H8/3003 Datasheet(PDF) 523 Page - Renesas Technology Corp |
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H8/3003 Datasheet(HTML) 523 Page - Renesas Technology Corp |
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523 / 715 page  Section 16 Clock Pulse Generator 16.1 Overview The H8/3003 has a built-in clock pulse generator (CPG) that generates the system clock (ø) and other internal clock signals (ø/2 to ø/4096). The H8/3003 is available in a clock-halving version and a 1:1 version, which have different clock pulse generator configurations. The clock pulse generator of the clock-halving version consists of an oscillator circuit, a system clock divider, and prescalers for the on-chip supporting modules. The clock pulse generator of the 1:1 version consists of an oscillator circuit, a duty adjustment circuit, and the prescalers. 16.1.1 Block Diagram Figure 16-1 shows block diagrams of the clock pulse generator. Figure 16-1 Block Diagram of Clock Pulse Generator XTAL EXTAL CPG ø ø/2 to ø/4096 XTAL EXTAL CPG ø ø/2 to ø/4096 Oscillator Frequency divider (1/2) Prescalers a. Clock pulse generator of clock-halving version b. Clock pulse generator of 1:1 version Oscillator Duty adjustment circuit Prescalers 505 |
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