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HCS08 データシート(PDF) 86 Page - Motorola, Inc |
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HCS08 データシート(HTML) 86 Page - Motorola, Inc |
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86 / 290 page ![]() Internal Clock Generator (ICG) Module MC9S08GB/GT 86 MOTOROLA 6.2.2 Detailed Signal Descriptions This section describes each pin signal in detail. 6.2.2.1 EXTAL— External Reference Clock / Oscillator Input If the first write to the ICG control register 1 selected FLL engaged external or FLL bypassed modes, this signal is the analog external/reference clock or the input of the oscillator circuit. If the first write to the ICG control register 1 selected FLL engaged internal or self-clocked modes, this signal has no effect on the ICG. 6.2.2.2 XTAL— Oscillator Output If the first write to the ICG control register 1 selected FLL engaged external or FLL bypassed modes using a crystal/resonator reference, this signal is the analog output of the oscillator amplifier circuit. In all other cases, this signal has no effect on the ICG. 6.2.3 External Clock Connections If an external clock is used, then the pins are connected as shown below. Figure 6-4 External Clock Connections Table 6-1 Signal Properties Name Function Reset State EXTAL External clock/oscillator input Analog input XTAL Oscillator output Analog output ICG XTAL EXTAL VSS CLOCK INPUT NOT CONNECTED |
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