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MCM20014 数据表(PDF) 44 Page - Motorola, Inc |
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MCM20014 数据表(HTML) 44 Page - Motorola, Inc |
44 / 54 page MOTOROLA MCM20014 44 6.10 Register Read Reading the MCM20014 registers is accomplished with the following I2C transactions (see Figure 26): • Master transmits a START • Master transmits the MCM20014 Slave Calling Ad- dress with “WRITE” indicated (BYTE=66h, 102d, 01100110b) • MCM20014 slave sends acknowledgment by forc- ing the SData Low during the 9th clock, if the Calling Address was received • Master transmits the MCM20014 Register Address • MCM20014 slave sends acknowledgment by forc- ing the SData Low during the 9th clock after receiv- ing the Register Address • Master transmits a Repeated START • Master transmits the MCM20014 Slave Calling Ad- dress with “READ” indicated (BYTE = 67h, 103d, 01100111b) • MCM20014 slave sends acknowledgment by forc- ing the SDATA Low during the 9th clock, if the Call- ing Address was received • At this point, the MCM20014 transitions from a “Slave-Receiver” to a “Slave-Transmitter” • MCM20014 sends the SCLK and the Register Data contained in the Register Address that was previ- ously received from the master; MCM20014 transi- tions to slave-receiver • Master does not send an acknowledgment (NAK) • Master transmits STOP to end the read cycle Figure 26. READ Cycle using I2C Bus SCLK SDATA Start Signal Ack Bit 1 2 34 5 6 78 MSB LSB 1 2 34 5 6 78 MSB LSB 9 9 AD7 AD6 AD5 AD4 AD3 AD2 AD1 D7 D6 D5 D4 D3 D2 D1 D0 MCM20014 I2C Bus Address MCM20014 Register Address Write from MCM20014 Ack Bit from MCM20014 XX Repeated Start Signal 1 2 34 5 6 78 MSB LSB 9 Read SCLK SDATA 12 3 4 5 6 7 8 MSB LSB D7 D6 D5 D4 D3 D2 D1 D0 9 Data from MCM20014 Register Stop Signal from MASTER Single Byte Transfer to Master MCM20014 I2C Bus Address SCLK SDATA No Ack. Bit from MASTER terminates the transfer “0” “1” “0” “1” “0” “1” “1” AD7 AD6 AD5 AD4 AD3 AD2 AD1 “0” “1” “0” “1” “0” “1” “1” Ack Bit fromMCM20014 At this point the MCM20014 transitions from a “SLAVE-receiver” to a “SLAVE- transmitter” The MCM20014 transitions from a “SLAVE-transmitter” to a “SLAVE-receiver” after the register data is sent |
类似零件编号 - MCM20014 |
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类似说明 - MCM20014 |
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