Electronic Components Datasheet Search |
|
DS1670E Datasheet(PDF) 4 Page - Maxim Integrated Products |
|
DS1670E Datasheet(HTML) 4 Page - Maxim Integrated Products |
4 / 16 page DS1670 4 of 16 POWER-UP/POWER-DOWN CONSIDERATIONS The DS1670 was designed to operate with a power supply of 3.3V. When 3.3V are applied within nominal limits, the device becomes fully accessible after tRPU (250ms typical). Before tRPU elapses, all inputs are disabled. When VCC drops below 2.88V (typical), the RST pin is driven low. When VCC drops below the lower of 2.7V (typical) or the battery voltage, the device is switched over to the backup power supply. During power-up, when VCC returns to an in-tolerance condition, the RST pin is kept in the active state for 250ms (typical) to allow the power supply and microprocessor to stabilize. ADDRESS/COMMAND BYTE The command byte for the DS1670 is shown in Figure 2. Each data transfer is initiated by a command byte. Bits 0 through 6 specify the addresses of the registers to be accessed. The MSB (bit 7) is the Read/Write bit. This bit specifies whether the accessed byte will be read or written. A read operation is selected if bit 7 is a 0 and a write operation is selected if bit 7 is a 1. The address map for the DS1670 is shown in Figure 3. ADDRESS/COMMAND BYTE Figure 2 7 6 5 4 3 2 1 0 RD WR A6 A5 A4 A3 A2 A1 A0 DS1670 ADDRESS MAP Figure 3 BIT 7 BIT 0 00 0 10 SECONDS SECONDS 01 0 10 MINUTES MINUTES 10 HR 02 0 12 24 A/P 10 HR HOURS 03 0 0 0 0 0 DAY 04 0 0 10 DATE DATE 05 0 0 0 10 MO. MONTH 06 10 YEAR YEAR 07 M 10 SEC ALARM SECONDS ALARM 08 M 10 MIN ALARM MINUTES ALARM 10 HR 09 M 12 24 A/P 10 HR HOUR ALARM 0A M 0 0 0 DAY ALARM 0B CONTROL REGISTER 0C STATUS REGISTER 0D WATCHDOG REGISTER 0E ADC REGISTER 0F 7F RESERVED |
Similar Part No. - DS1670E |
|
Similar Description - DS1670E |
|
|
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 |