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FT800Q-R 数据表(PDF) 15 Page - Bridgetek Pte Ltd. |
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FT800Q-R 数据表(HTML) 15 Page - Bridgetek Pte Ltd. |
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15 / 46 page ![]() Copyright © Bridgetek Pte Ltd 15 FT800 Embedded Video Engine Datasheet Version 1.4 Document No.: BRT_000039 Clearance No.: BRT#001 4.2 System Clock 4.2.1 Clock Source The FT800 can be configured to use any of the three clock sources for system clock: Internal relaxation oscillator clock External 12MHz crystal External 12MHz square wave clock Figure 4-5 and Figure 4-6 shows the pin connections for these clock options. Commands CLKEXT and CLKINT switch between internal oscillator and external crystal oscillator and are synchronised to VSYNC on the fly. The external crystal oscillator is recommended for applications which require higher quality audio reproduction. Figure 4-4 Internal Relaxation Oscillator Connection Figure 4-5 Crystal oscillator connection Figure 4-6 External clock input |
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