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LTC4215 数据表(PDF) 18 Page - Linear Technology |
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LTC4215 数据表(HTML) 18 Page - Linear Technology |
18 / 24 page LTC4215 18 4215fb APPLICATIO S I FOR ATIO same seven bit address with the R/ ⎯W bit now set to one. The LTC4215 acknowledges and send the contents of the requested register. The transmission is ended when the master sends a STOP condition. If the master acknowledges the transmitted data byte, as in a Read Word command, Figure 10, the LTC4215 repeats the requested register as the second data byte. Alert Response Protocol When any of the fault bits in FAULT register D are set, an optional bus alert is generated if the appropriate bit in the ALERT register B is also set. If an alert is enabled, the cor- responding fault causes the ⎯A⎯L⎯E⎯R⎯T pin to pull low. After the bus master controller broadcasts the Alert Response Address, the LTC4215 responds with its address on the SDA line and then release ⎯A⎯L⎯E⎯R⎯T as shown in Figure 11. The ⎯A⎯L⎯E⎯R⎯T line is also released if the device is addressed by the bus master. The ⎯A⎯L⎯E⎯R⎯T signal is not pulled low again until the FAULT register indicates a different fault has occurred or the original fault is cleared and it occurs again. Note that this means repeated or continuing faults do not generate alerts until the associated FAULT register bit has been cleared. S ADDRESS 1 0 a4:a0 4215 F07 FROM MASTER TO SLAVE FROM SLAVE TO MASTER A: ACKNOWLEDGE (LOW) A: NOT ACKNOWLEDGE (HIGH) R: READ BIT (HIGH) W: WRITE BIT (LOW) S: START CONDITION P: STOP CONDITION COMMAND DATA X X X X X b2:b0 0 W 00 0 b7:b0 A A AP S ADDRESS 1 0 a4:a0 COMMAND DATA DATA X X X X X b2:b0 0 W 00 0 0 4215 F08 X X X X X X X X b7:b0 A A A AP S ADDRESS 1 0 a4:a0 1 0 a4:a0 1 0 COMMAND S ADDRESS R A b7:b0 1 DATA X X X X X b2:b0 0 W 00 4215 F10 A A AP S ADDRESS 1 0 a4:a0 1 0 a4:a0 1 0 COMMAND S ADDRESS R A b7:b0 1 DATA X X X X X b2:b0 0 W 00 4215 F11 A 0 A b7:b0 DATA A AP S ALERT RESPONSE ADDRESS 0 0 0 1 1 0 0 DEVICE ADDRESS 1 0 a4:a0 0 1 1 R 0 4215 F11 A A P Figure 7. LTC4215 Serial Bus SDA Write Byte Protocol Figure 8. LTC4215 Serial Bus SDA Write Word Protocol Figure 9. LTC4215 Serial Bus SDA Read Byte Protocol Figure 10. LTC4215 Serial Bus SDA Read Word Protocol Figure 11. LTC4215 Serial Bus SDA Alert Response Protocol |
类似零件编号 - LTC4215 |
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类似说明 - LTC4215 |
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