Electronic Components Datasheet Search |
|
MAX7300AAI Datasheet(PDF) 10 Page - Maxim Integrated Products |
|
MAX7300AAI Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 20 page Operation with Multiple Masters If the MAX7300 is operated on a 2-wire interface with multiple masters, a master reading the MAX7300 should use a repeated start between the write, which sets the MAX7300’s address pointer, and the read(s) that takes the data from the location(s). This is because it is pos- sible for master 2 to take over the bus after master 1 has set up the MAX7300?s address pointer, but before master 1 has read the data. If master 2 subsequently changes, the MAX7300’s address pointer, then master 1’s delayed read can be from an unexpected location. Command Address Autoincrementing Address autoincrementing allows the MAX7300 to be configured with the shortest number of transmissions by minimizing the number of times the command address needs to be sent. The command address stored in the MAX7300 generally increments after each data byte is written or read (Table 4). Initial Power-Up On initial power-up, all control registers are reset and the MAX7300 enters shutdown mode (Table 6). Transition (Port Data Change) Detection Port transition detection allows any combination of the seven ports P24–P30 to be continuously monitored for changes in their logic status (Figure 10). A detected change is flagged on the transition detection mask reg- ister INT status bit, D7 (Table 10). If port P31 is config- ured as an output (Tables 1 and 2), then P31 also automatically becomes an active-high interrupt output (INT), which follows the condition of the INT status bit. Port P31 is set as output by writing bit D7 = 0 and bit D6 = 1 to the port configuration register (Table 1). Note that the MAX7300 does not identify which specific port(s) caused the interrupt, but provides an alert that one or more port levels have changed. The mask register contains 7 mask bits that select which of the seven ports P24–P30 are to be monitored (Table 10). Set the appropriate mask bit to enable that port for transition detect. Clear the mask bit if transi- Figure 6. Slave Address Figure 5. Acknowledge SDA SCL 1 0 A3 A2 A1 A0 0 MSB LSB R/W ACK SCL SDA BY TRANSMITTER CLOCK PULSE FOR ACKNOWLEDGMENT START CONDITION SDA BY RECEIVER 1 2 8 9 S www.maximintegrated.com Maxim Integrated │ 10 MAX7300 2-Wire-Interfaced, 2.5V to 5.5V, 20-Port or 28-Port I/O Expander |
Similar Part No. - MAX7300AAI |
|
Similar Description - MAX7300AAI |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |