Electronic Components Datasheet Search |
|
PD46364362BF1-E33-EQ1 Datasheet(PDF) 9 Page - Renesas Technology Corp |
|
PD46364362BF1-E33-EQ1 Datasheet(HTML) 9 Page - Renesas Technology Corp |
9 / 36 page μPD46364092B, μPD46364182B, μPD46364362B R10DS0091EJ0400 Rev.4.00 Page 9 of 35 Nov 09, 2012 Power-On Sequence in DDR II SRAM DDR II SRAMs must be powered up and initialized in a predefined manner to prevent undefined operations. The following timing charts show the recommended power-on sequence. The following power-up supply voltage application is recommended: VSS, VDD, VDDQ, VREF, then VIN. VDD and VDDQ can be applied simultaneously, as long as VDDQ does not exceed VDD by more than 0.5 V during power-up. The following power-down supply voltage removal sequence is recommended: VIN, VREF, VDDQ, VDD, VSS. VDD and VDDQ can be removed simultaneously, as long as VDDQ does not exceed VDD by more than 0.5 V during power-down. Power-On Sequence Apply power and tie DLL# to HIGH. Apply VDDQ before VREF or at the same time as VREF. Provide stable clock for more than 20 μs to lock the PLL. Continuous min.4 NOP(LD# = high) cycles are required after PLL lock up is done. PLL Constraints The PLL uses K clock as its synchronizing input and the input should have low phase jitter which is specified as TKC var. The PLL can cover 120 MHz as the lowest frequency. If the input clock is unstable and the PLL is enabled, then the PLL may lock onto an undesired clock frequency. Power-On Waveforms 20 μs or more Stable Clock VDD/VDDQ Stable (< ±0.1 V DC per 50 ns) VDD/VDDQ Clock Unstable Clock Normal Operation Start DLL# Fix HIGH (or tied to VDDQ) LD# 4 Times NOP |
Similar Part No. - PD46364362BF1-E33-EQ1 |
|
Similar Description - PD46364362BF1-E33-EQ1 |
|
|
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 |