Electronic Components Datasheet Search |
|
PTN3500DH Datasheet(PDF) 7 Page - NXP Semiconductors |
|
PTN3500DH Datasheet(HTML) 7 Page - NXP Semiconductors |
7 / 15 page Philips Semiconductors Product specification PTN3500 Maintenance and control device 2001 Jan 17 7 MEMORY OPERATIONS Write operations Write operations require an additional address field to indicate the memory address location to be written. The address field is eight bits long, providing access to any one of the 256 words of memory. There are two types of write operations, byte write and page write. Byte Write (see Figure 12) To perform a byte write the start condition is followed by the memory slave address and the R/W bit set to 0. The PTN3500 will respond with an acknowledge and then consider the next eight bits sent as the word address and the eight bits after the word address as the data. The PTN3500 will issue an acknowledge after the receipt of both the word address and the data. To terminate the data transfer the master issues the stop condition, initiating the internal write cycle to the non-volatile memory. Only write and read operations to the Quasi-bidirectional I/O are allowed during the internal write cycle. Page Write (see Figure 13) A page write is initiated in the same way as the byte write. If after sending the first word of data, the stop condition is not received the PTN3500 considers subsequent words as data. After each data word the PTN3500 responds with an acknowledge and the two least significant bits of the memory address field are incremented. Should the master not send a stop condition after four data words the address counter will return to its initial value and overwrite the data previously written. After the receipt of the stop condition the inputs will behave as with the byte write during the internal write cycle. P SW00553 SDA SLAVE ADDRESS (MEMORY) WORD ADDRESS DATA S 1010 A2A1A0 A A R/W START CONDITION STOP CONDITION 0A ACKNOWLEDGE FROM SLAVE ACKNOWLEDGE FROM SLAVE ACKNOWLEDGE FROM SLAVE Figure 12. Byte write S P SDA SW00554 SLAVE ADDRESS (MEMORY) WORD ADDRESS DATA TO MEMORY 101 0 A2 A1 A0 A A 0 START CONDITION R/W ACKNOWLEDGE FROM SLAVE ACKNOWLEDGE FROM SLAVE DATA n A ACKNOWLEDGE FROM SLAVE DATA +3n DATA TO MEMORY STOP CONDITION A Figure 13. Page Write |
Similar Part No. - PTN3500DH |
|
Similar Description - PTN3500DH |
|
|
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 |