LFXP2-8E-7FT256C Lattice, LFXP2-8E-7FT256C Datasheet - Page 311

• Manufacturer Part Number: LFXP2-8E-7FT256C
• Description: FPGA - Field Programmable Gate Array 8K LUTs 201I/O Inst- on DSP 1.2V -7 Spd
• Manufacturer: Lattice

Specifications of LFXP2-8E-7FT256C

• Number Of Macrocells: 8000
• Number Of Programmable I/os: 201
• Data Ram Size: 226304
• Supply Voltage (max): 1.26 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Supply Voltage (min): 1.14 V
• Package / Case: FTBGA-256
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Lattice Semiconductor
SEDCLKIN
Clock input to the SED hardware.
When external SPI configuration is used, this clock is derived from the LatticeXP2’s on-chip oscillator. The on-chip
oscillator’s output goes through a divider to create MCCLK. MCCLK goes through another divider to create SED-
CLKIN.
The software default for MCCLK is 2.5 MHz, but this can be modified using the MCCLK_FREQ global preference in
ispLEVER’s pre-map Design Planner (see TN1141,
MCCLK). It has a range of 2.5 MHz to 66 MHz.
The divider for SEDCLKIN can be set to 1, 2, 4, 8, 16 or 32. The default is 1, so the default SEDCLKIN frequency is
2.5 MHz. The divider value can be set using a parameter, see the example code at the end of this document.
If internal Flash configuration mode is used, SEDCLKIN can only be set to 3.1 MHz with a divider setting of 1.
Note that SEDCLKIN is an internally generated signal, so it should not be included as an input in the user design.
See the examples at the end of this document. Also note that while inputs to the SED block are clocked using SED-
CLKIN, no attempt has been made to synchronize between clock domains. If this is a concern for a particular
design then the designer will need to provide synchronization.
OSC_DIV
Options: 1, 2, 4, 8, 16 or 32 for external configuration. Only 1 can be selected for internal configuration. The CLK
that drives the SED module will be set by MCCLK/OSC_DIV.
SEDENABLE
Level-sensitive signal which starts SED checking.
Table 16-2. SEDENABLE
SEDCLKOUT
Gated version of SEDCLKIN, SEDCLKOUT is gated by SEDENABLE.
SEDSTART
Active high input to the SED hardware, sampled on the rising edge of SEDCLKIN.
Table 16-3. SEDSTART
SEDFRCERRN
Active high input to the SED hardware, sampled on the rising edge of SEDCLKIN.
Table 16-4. SEDFRCERRN
State
State
State
1
0
1
0
Enables output of SEDCLKOUT, arms SED hardware.
Start error detection. Must be high a minimum of one SEDCLKIN period.
No action.
No action.
Forces SEDERR high, simulating an SED error.
LatticeXP2 sysCONFIG Usage Guide
16-3
Description
Description
Description
Detection Usage Guide
LatticeXP2 Soft Error
for supported values of