EP4SGX290KF40C3N Altera, EP4SGX290KF40C3N Datasheet - Page 63

• Manufacturer Part Number: EP4SGX290KF40C3N
• Description: IC STRATIX IV GX 290K 1517FBGA
• Manufacturer: Altera
• Series: Stratix® IV GXr

Specifications of EP4SGX290KF40C3N

• Number Of Logic Elements/cells: 291200
• Number Of Labs/clbs: 11648
• Total Ram Bits: 17248
• Number Of I /o: 744
• Voltage - Supply: 0.87 V ~ 0.93 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 1517-FBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -
• Other names: 544-2624

Chapter 3: TriMatrix Embedded Memory Blocks in Stratix IV Devices
Overview
February 2011 Altera Corporation
Error Correction Code (ECC) Support
1
1
Stratix IV M144K blocks have built-in support for error correction code (ECC) when in
×64-wide simple dual-port mode. ECC allows you to detect and correct data errors in
the memory array. The M144K blocks have a single-error-correction
double-error-detection (SECDED) implementation. SECDED can detect and fix a
single bit error in a 64-bit word, or detect two bit errors in a 64-bit word. It cannot
detect three or more errors.
The M144K ECC status is communicated using a three-bit status flag
eccstatus[2..0]. The status flag can be either registered or unregistered. When
registered, it uses the same clock and asynchronous clear signals as the output
registers. When unregistered, it cannot be asynchronously cleared.
Table 3–3
Table 3–3. Truth Table for ECC Status Flags
You cannot use the byte enable feature when ECC is engaged.
Read-during-write “old data mode” is not supported when ECC is engaged.
No error
Single error and fixed
Double error and no fix
Illegal
Illegal
Illegal
Illegal
lists the truth table for the ECC status flags.
Status
eccstatus[2]
0
0
1
0
0
1
1
eccstatus[1]
0
1
0
0
1
0
1
Stratix IV Device Handbook Volume 1
eccstatus[0]
0
1
1
1
0
0
X
3–7