 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
MC8640TVU1000H Datasheet(PDF) 16 Page - Freescale Semiconductor, Inc |
|
||||||||||||||||||||||||||||||
MC8640TVU1000H Datasheet(HTML) 16 Page - Freescale Semiconductor, Inc |
|
|
16 / 140 page  MPC8640 and MPC8640D Integrated Host Processor Hardware Specifications, Rev. 1 16 Freescale Semiconductor Input Clocks It is imperative to note that the processor’s minimum and maximum SYSCLK, core, and VCO frequencies must not be exceeded regardless of the type of clock source. Therefore, systems in which the processor is operated at its maximum rated e600 core frequency should avoid violating the stated limits by using down-spreading only. SDn_REF_CLK and SDn_REF_CLK was designed to work with a spread spectrum clock (+0 to 0.5% spreading at 30-33kHz rate is allowed), assuming both ends have same reference clock. For better results use a source without significant unintended modulation. 4.2 Real Time Clock Timing The RTC input is sampled by the platform clock (MPX clock). The output of the sampling latch is then used as an input to the counters of the PIC. There is no jitter specification. The minimum pulse width of the RTC signal should be greater than 2x the period of the MPX clock. That is, minimum clock high time is 2 × tMPX, and minimum clock low time is 2 × tMPX. There is no minimum RTC frequency; RTC may be grounded if not needed. 4.3 eTSEC Gigabit Reference Clock Timing Table 9 provides the eTSEC gigabit reference clocks (EC1_GTX_CLK125 and EC2_GTX_CLK125) AC timing specifications for the MPC8640. Table 8. Spread Spectrum Clock Source Recommendations At recommended operating conditions. See Table 2. Parameter Min Max Unit Notes Frequency modulation — 50 kHz 1 Frequency spread — 1.0 % 1, 2 Notes: 1. Guaranteed by design. 2. SYSCLK frequencies resulting from frequency spreading, and the resulting core and VCO frequencies, must meet the minimum and maximum specifications given in Table 7. Table 9. EC n_GTX_CLK125 AC Timing Specifications Parameter/Condition Symbol Min Typical Max Unit Notes EC n_GTX_CLK125 frequency fG125 — 125 ±100 ppm —MHz 3 EC n_GTX_CLK125 cycle time tG125 —8 — ns EC n_GTX_CLK125 peak-to-peak jitter tG125J — — 250 ps 1 |
Similar Part No. - MC8640TVU1000H |
|
Similar Description - MC8640TVU1000H |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
