 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
PCF2127AT/1 Datasheet(PDF) 15 Page - NXP Semiconductors |
|
|
|||||||||||||||||||||||||||||
PCF2127AT/1 Datasheet(HTML) 15 Page - NXP Semiconductors |
|
|
15 / 80 page  PCF2127A_2 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 02 — 7 May 2010 15 of 80 NXP Semiconductors PCF2127A Integrated RTC, TCXO and quartz crystal 8.5 General purpose 512 bytes static RAM The PCF2127A contains a general purpose 512 bytes static RAM. This integrated SRAM is battery backed and can therefore be used to store data which is essential for the application to survive a power outage. 9 bits, RA[8:0], define the RAM address pointer in registers RAM_addr_MSB and RAM_addr_LSB. The register address pointer increments after each read or write automatically up to 1Bh and then wraps around to address 00h (see Figure 3 on page 6). Data is transferred to or from the RAM via the interface. To write to the RAM, the register RAM_wrt_cmd, to read from the RAM the register RAM_rd_cmd must be addressed explicitly. 8.5.1 Register RAM_addr_MSB 8.5.2 Register RAM_addr_LSB 8.5.3 Register RAM_wrt_cmd 8.5.4 Register RAM_rd_cmd Table 13. RAM_addr_MSB - RAM address MSB register (address 1Ah) bit description Bit Symbol Description 7 to 1 - unused 0 RA8 RAM address, MSB (9th bit) Table 14. RAM_addr_LSB - RAM address LSB register (address 1Bh) bit description Bit Symbol Description 7 to 0 RA[7:0] RAM address, LSB (1st to 8th bit) Table 15. RAM_wrt_cmd - RAM write command register (address 1Ch) bit description Bit Symbol Description 7 to 0 - data to be written into RAM Table 16. RAM_rd_cmd - RAM read command register (address 1Dh) bit description Bit Symbol Description 7 to 0 - data to be read from RAM |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | 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 |
New Zealand ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
