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8XC151SA データシート(PDF) 11 Page - Intel Corporation |
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8XC151SA データシート(HTML) 11 Page - Intel Corporation |
11 / 33 page 8XC151SASB HIGH-PERFORMANCE CHMOS MICROCONTROLLER Table 7 Signal Descriptions (Continued) Signal Type Description Multiplexed Name With VSS GND Circuit Ground Connect this pin to ground VSS1 GND Secondary Ground This ground is provided to reduce ground bounce and improve power supply bypassing Connection of this pin to ground is recommended However when using the 8XC151SASB as a pin- for-pin replacement for the 8XC51BH VSS1 can be unconnected without loss of compatibility (Not available on DIP) VSS2 GND Secondary Ground 2 This ground is provided to reduce ground bounce and improve power supply bypassing Connection of this pin to ground is recommended However when using the 8XC151SASB as a pin-for-pin replacement for the 8XC51FX VSS2 can be unconnected without loss of compatibility (Not available on DIP) WR O Write Write signal output to external memory P36 XTAL1 I Input to the On-chip Inverting Oscillator Amplifier To use the internal oscillator a crystalresonator circuit is connected to this pin If an external oscillator is used its output is connected to this pin XTAL1 is the clock source for internal timing XTAL2 O Output of the On-chip Inverting Oscillator Amplifier To use the internal oscillator a crystalresonator circuit is connected to this pin If an external oscillator is used leave XTAL2 unconnected The descriptions of A158P270 and AD70P070 are for the nonpage-mode chip configuration (compatible with 44-lead PLCC and 40-pin DIP MCS 51 microcontrollers) If the chip is configured for page-mode operation port 0 carries the lower address bits (A70) and port 2 carries the upper address bits (A158) and the data (D70) 11 |
同様の部品番号 - 8XC151SA |
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同様の説明 - 8XC151SA |
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