Electronic Components Datasheet Search |
|
WME128K8-140DEQA Datasheet(PDF) 6 Page - White Electronic Designs Corporation |
|
WME128K8-140DEQA Datasheet(HTML) 6 Page - White Electronic Designs Corporation |
6 / 11 page 6 White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com White Electronic Designs WME128K8-XXX January 2004 Rev. 5 White Electronic Designs Corp. reserves the right to change products or specifications without notice. DATA POLLING The WME128K8-XXX offers a data polling feature which allows a faster method of writing to the device. Figure 6 shows the timing diagram for this function. During a byte or page write cycle, an attempted read of the last byte written will result in the complement of the written data on I/O7. Once the write cycle has been completed, true data is valid on all outputs and the next cycle may begin. Data polling may begin at any time during the write cycle. FIGURE 6 – DATA POLLING WAVEFORMS DATA POLLING CHARACTERISTICS VCC = 5.0V, VSS = 0V, -55°C ≤ TA ≤ +125°C Parameter Symbol Min Max Unit Data Hold Time tdh 10 ns OE# Hold Time toeh 10 ns OE# To Output Valid toe 55 ns Write Recovery Time twr 0 ns WE# t OEH t DH t OE t WR HIGH Z CS# OE# I/O7 ADDRESS TOGGLE BUT CHARACTERISTICS(1) Symbol Parameter Min Max Units tDH Data Hold Time 10 ns tOEH OE Hold Time 10 ns tOE OE to Output Delay ns tOEHP OE High Pulse 150 ns tWR Write Recovery Time 0 ns TOGGLE BIT: In addition to DATA# Polling another method for determining the end of a write cycle is provided . During the write operation, successive attempts to read data from the device will result in I/O6 toggling between one and zero. Once the write has completed, I/O6 will stop toggling and valid data will be read. Reading the toggle bit may begin at any time during the write cycle. NOTE: 1. Toggling either OE# or CS# or both OE# and CS# will operate toggle bit. 2. Beginning and ending state of I/O6 will vary 3. Any address location may be used but the address should not vary. tWR HIGH Z tDH tOE tOEH WE# CS# OE# I/O6 (2) |
Similar Part No. - WME128K8-140DEQA |
|
Similar Description - WME128K8-140DEQA |
|
|
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 |