The 7 Series FPGA Frame ECC logic checks for unit or double bit errors in the configuration frame data. It uses a 13-bit Hamming code check value calculated based on frame data (BitGen generation).
During readback, the frame ECC logic calculates a composite value that uses all of the frame bits, including the ECC bits. If the bit has not changed, or the value originally set, then SYNDROME[12:0] is zero. If a bit changes, including all ECC bits, the position of that bit is indicated by SYNDROME[11:0]. If two bits change, SYNDROME[12] is 0 and the remaining bits are non-zero. If the number of bits changed exceeds two digits, SYNDROME[12:0] is undefined.
If one or two bits change, the module's error output can be asserted. To use frame ECC logic, the FRAME_ECC _VIRTEX6 primitive must be instantiated in the user design and must be read back via the SelectMAP, JTAG, or ICAP interface.
At the end of each readback frame, the syndrome_valid signal can be asserted for one cycle of the readback clock (CCLK, TCK, or ICAP_CLK). The number of cycles required to read back a frame is not fixed and will vary depending on the interface used. Fixing a bit that has changed requires a user design. The FRAME_ECCE2 logic does not fix the changed bits. The design must be able to store data for at least one frame, or it must be able to retrieve the original data frame for reloading.
The simplest operation is: 1. Read a frame through ICAP and it is in the module's RAM. The frame address is generated when each frame is read. 2. If an error is indicated by the error output of the FRAME_ECC module, the readback will stop and the SYNDROME value will be saved. 3. If SYNDROME[12] is 0 and SYNDROME[11:0] is non-zero, the entire frame must be restored. If SYNDROME[12] is 1, SYNDROME[11:0] can be used to locate the error bit of the saved frame. 4. The repaired frame will then be written back to the frame address generated in step 1. 5. Read back will then resume at the next frame address.
Pin name
Types of
Description
SYNDROMEVALID
ECCERROR
SYNDROME[12:0]
CRCERROR
FAR[25:0]
SYNWORD[6:0]
SYNBIT[4:0]
ECCERRORSINGLE
Output | Frame ECC combines valid pulses. One cycle of each frame activation. Used to sample ERROR and SYNDROME[12:0]. |
Output | When SYNDROMEVALID is activated, this output indicates whether a framing error has been checked: When SYNDROME[12:0] is non-zero, ERROR=1. When SYNDROME[12:0] is 0, ERROR=0. |
Output | When SYNDROMEVALID is activated, this output reflects the framing error condition: No bit error: [12]==0, [11:0] ==0 There is a bit error: [12]==1, [11:0]! =0 There are two bit errors: [12]==0, [11:0]! = 0 More than two digits: SYNDROME is uncertain Check digit error: [12]==1, [11:0]==0 |
Output | RBCRC error. Please see Chapter 8 of (UG470): Read Back CRC |
Output | Frame address register value. SEU correction/injection and ICAP applications can see the FAR registers for an advantage. This output can point to an EFAR or FAR configuration register that depends on the FARSRC attribute. |
Output | The wrong word address is output. The index (0? -> 80) of the 32-bit word in the frame (an ECC error has been checked). Has been decoded from SYNDROME. ECCERRORSINGLE is valid when high. |
Output | Wrong bit address. The index (0 -> 31) of the bit in the word (pointed by SYNWORD in the checked frame). ECCERRORSINGLE is valid when high. |
Output | Indicates the unit frame ECC error that has been checked |
For SSIT devices, FRAME_ECCE2 is available on all SLRs. The user should lay out and use this component to check the ECC on each SLR.
If the design contains only a single FRAME_ECC and there is no layout, it will be laid out in the main SLR.
Power Meter is a monitoring and testing instrument which determines the power consumption of a connected appliance and the cost of the electricity consumed.
Built-in 3.6V rechargeable Batteries ( . The purpose of the batteries is to store the total electricity and memory setting
Resetting
If an abnormal display appears or the buttons produce no response, the instrument must be reset. To do this,
press the RESET button.
Display Mode
Entire LCD can be displayed for about 1 minute and then it automatically gets into Model. To transfer from
one mode to the other, press the FUNCTION button.
Mode 1: Time/Watt/Cost Display Display duration(how long) this device connect to power source.LCD on first line shows 0:00 with first two figures mean minutes(2 figures will occur while occur at 10 min) and the rest shows seconds. After 60mins, it displays 0:00 again with first two numbers meas hour(2 figures will occur at 10hours)and the rest shows minutes. The rest can be done in the same manner which means after 24 hours, it will re-caculate. LCD on second line displays current power which ranges in 0.0W 〜 9999W. LCD on third line displays the current electricity costs which ranges in O.Ocost 〜 9999cost. It will keep on O.OOcost before setting rate without other figures.
Mode 2: Time/Cumulative electrical quantity Display Display duration(how long) this device connect to power source.
LCD on first line shows 0:00 with first two figures mean minutes(2 figures will occur while occur at 10 min) and the rest shows seconds. After 60mins, it displays 0:00 again with first two numbers meas hour(2 figures will occur at 10hours)and the rest shows minutes. The rest can be done in the same manner which
means after 24 hours, it will re-caculate. LCD on second line displays current cumulative electrical quantity which ranges in 0.000KWH 〜 9999KWH without other figures. LCD on third line displays"DAY"- "1 'Will be showed on numerical part(the other three figures will be showed at carry) which means it has cumulated electrical quantity for 24hours(one day). The rest can be done in the same manner untill the maximal cumulative time of 9999 days.
Mode 3: TimeA^bltage/Frequency Display LCD on first line displays the same as Mode 1 dones. LCD on second line displays current voltage supply (v) which ranges in 0.0V 〜 9999V .LCD on third line displays current frequency (HZ) which ranges in 0.0HZ 〜 9999Hz without other figures.
Mode 4: Time/Current/Power Factor Display LCD on first line displays the same as Mode 1 dones.LCD on second line displays load current which ranges in 0.0000A 〜 9999A. LCD on third line displays current power factor which ranges in 0.00PF 〜 LOOPF without other figures.
Mode 5:Time/Minimum Power Display LCD on first line displays the same as Mode 1 dones. LCD on
second line displays the minimum power which ranges in 0.0W 〜 9999W. LCD on third line displays character of "Lo" without other figures.
Mode 6: Time/Maximal Power Display LCD on first line displays the same as Mode 1 dones. LCD on second line displays the maximal power which ranges in 0.0W 〜 9999W. LCD on third line displays character of "Hi" without other figures.
Mode 7: Time/Price Display LCD on first line displays the same as Mode 1 dones. LCD on third line displays the cost which ranges in O.OOCOST/KWH 〜 99.99COST/KWH without other figures.
Overload Display: When the power socket connects the load over 3680W, LCD on second line displays the''OVERLOAD[ with booming noise to warn the users, (selectable choice)
Supplemental informations:
1: Except [OVERLOAD[ interface, LCD on first line display time in repitition within 24hours.
2: LCD on first line, second line or third line described in this intruction take section according to two black lines on LCD screen. Here it added for clarified purpose.
3. Mode 7 will directly occur while press down button "cost".
4. [UP"&"Down" are in no function under un-setting mode.
Setting Mode
1. Electricity price setting
After keeping COST button pressed lasting more than 3 seconds(LCD on third line display system defaults price, eg O.OOCOST/KWH ),the rendered content begins moving up and down which means that the device
has entered the setting mode. After that, press FUNCTION for swithing , then press "UP"and "DOWN" button again to set value which ranges in OO.OOCOST/KWH 〜 99.99COST/KWH. After setting all above, press COST to return to Mode7 or it will automatically return to Mode7 without any pressing after setting with data storage.
Power meter socket, Energy meter socket, Energy meter cost socket, Power meter cost socket, Energy power meter socket
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