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P87C552 Datasheet(PDF) 43 Page - NXP Semiconductors |
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P87C552 Datasheet(HTML) 43 Page - NXP Semiconductors |
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43 / 74 page  Philips Semiconductors Preliminary specification P87C552 80C51 8-bit microcontroller 8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM, capture/compare, high I/O, low voltage (2.7V–5.5V), low power 1999 Mar 30 43 Table 6. Master Transmitter Mode STATUS STATUS OF THE APPLICATION SOFTWARE RESPONSE STATUS CODE (S1STA) STATUS OF THE I2C BUS AND SIO1 HARDWARE TO/FROM S1DAT TO S1CON NEXT ACTION TAKEN BY SIO1 HARDWARE (S1STA) SIO1 HARDWARE TO/FROM S1DAT STA STO SI AA 08H A START condition has been transmitted Load SLA+W X 0 0 X SLA+W will be transmitted; ACK bit will be received 10H A repeated START diti h b Load SLA+W or X 0 0 X As above condition has been transmitted Load SLA+R X 0 0 X SLA+W will be transmitted; SIO1 will be switched to MST/REC mode 18H SLA+W has been transmitted; ACK has bi d Load data byte or 0 0 0 X Data byte will be transmitted; ACK bit will be received been received no S1DAT action or 1 0 0 X Repeated START will be transmitted; no S1DAT action or 0 1 0 X STOP condition will be transmitted; STO flag will be reset no S1DAT action 1 1 0 X STOP condition followed by a START condition will be transmitted; STO flag will be reset 20H SLA+W has been transmitted; NOT ACK hb i d Load data byte or 0 0 0 X Data byte will be transmitted; ACK bit will be received has been received no S1DAT action or 1 0 0 X Repeated START will be transmitted; no S1DAT action or 0 1 0 X STOP condition will be transmitted; STO flag will be reset no S1DAT action 1 1 0 X STOP condition followed by a START condition will be transmitted; STO flag will be reset 28H Data byte in S1DAT has been transmitted; ACK hb i d Load data byte or 0 0 0 X Data byte will be transmitted; ACK bit will be received has been received no S1DAT action or 1 0 0 X Repeated START will be transmitted; no S1DAT action or 0 1 0 X STOP condition will be transmitted; STO flag will be reset no S1DAT action 1 1 0 X STOP condition followed by a START condition will be transmitted; STO flag will be reset 30H Data byte in S1DAT has been transmitted; NOT ACK h b i d Load data byte or 0 0 0 X Data byte will be transmitted; ACK bit will be received ACK has been received no S1DAT action or 1 0 0 X Repeated START will be transmitted; no S1DAT action or 0 1 0 X STOP condition will be transmitted; STO flag will be reset no S1DAT action 1 1 0 X STOP condition followed by a START condition will be transmitted; STO flag will be reset 38H Arbitration lost in SLA+R/W or Db No S1DAT action or 0 0 0 X I2C bus will be released; not addressed slave will be entered Data bytes No S1DAT action 1 0 0 X A START condition will be transmitted when the bus becomes free |
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