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80C554 Datasheet(PDF) 70 Page - NXP Semiconductors |
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80C554 Datasheet(HTML) 70 Page - NXP Semiconductors |
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70 / 76 page  Philips Semiconductors Preliminary specification 80C554/83C554/87C554 80C51 8-bit microcontroller – 6 clock operation 16K/512 OTP/ROM/ROMless, 7 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, 64L LQFP 2000 Nov 10 70 2.4V 0.45V 2.0V 0.8V NOTE: AC inputs during testing are driven at 2.4V for a logic ‘1’ and 0.45V for a logic ‘0’. Timing measurements are made at 2.0V for a logic ‘1’ and 0.8V for a logic ‘0’. Test Points 2.0V 0.8V SU00215 Figure 54. AC Testing Input/Output 2.4V NOTE: The float state is defined as the point at which a port 0 pin sinks 3.2mA or sources 400 µA at the voltage test levels. 2.4V 0.45V 0.45V Float 2.0V 0.8V 2.0V 0.8V SU00216 Figure 55. AC Testing Input, Float Waveform tRD tSU;STA tBUF tSU;STO 0.7 VCC 0.3 VCC 0.7 VCC 0.3 VCC tFD tRC tFC tHIGH tLOW tHD;STA tSU;DAT1 tHD;DAT tSU;DAT2 tSU;DAT3 START condition repeated START condition SDA (INPUT/OUTPUT) SCL (INPUT/OUTPUT) STOP condition START or repeated START condition SU00107A Figure 56. Timing SIO1 (I2C) Interface |
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