LFE2-20E-5FN256I Lattice, LFE2-20E-5FN256I Datasheet - Page 477

• Manufacturer Part Number: LFE2-20E-5FN256I
• Description: IC FPGA 21KLUTS 193I/O 256FPBGA
• Manufacturer: Lattice
• Series: ECP2r

Specifications of LFE2-20E-5FN256I

• Number Of Logic Elements/cells: 21000
• Number Of Labs/clbs: 2625
• Total Ram Bits: 282624
• Number Of I /o: 193
• Number Of Gates: -
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 256-BGA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 220-1170; LFE2-20E-5FN256I; Q6411457

Lattice Semiconductor
Table 8-49. SERDES Control Register 2 (QD_12)
Table 8-50. SERDES Control Register 3 (QD_13)
Table 8-51. SERDES Control Register 4 (QD_14)
Table 8-52. SERDES Control Register 5 (QD_15)
1. This is the default value used in ispLEVER 8.1.
Bit
5:3
2:0
7
6
Bit
7:6
5:2
1:0
7:5
4:3
2:0
Bit
Bit
7:0
RLOS_HSET [2:0]
RLOS_LSET [2:0] (Internal use only)
BUS8BIT_SEL
REFCK25X
CDR_LOL_SET [1:0]
REFCK_MODE [1:0]
Name
Reserved
Name
TX_VCO_CK_DIV[2:0]
Reserved
PLL_LOL_SET [1:0]
Name
Reserved
Name
1 = Internal high speed bit clock is 25x (for reference clock = 100MHz only)
0 = See REFCK_MODE
1 = Select 8-bit bus width
0 = Select 10-bit bus width (default)
LOS detector reference current adjustment for larger swing
000 = default
001 = +10%
010 = +15%
011 = +25%
100 = -10%
101 = -15%
110 = -25%
111 = -30%
00 = Internal high speed bit clock is 20x or 16x
01 = Internal high speed bit clock is 10x or 8x
1X = Reserved
CDR loss of lock setting:
Lock
00 = +/-1000ppm x2
01 = +/-2000ppm x2
10 = +/-4000ppm
11 = +/-300ppm
TxPLL loss of lock setting
Lock
00 = +/-300ppm x2
01 = +/-300ppm
10 = +/-1500ppm
11 = +/-4000ppm
VCO output frequency select:
000 = divided by 1
010 = divided by 2
100 = divided by 4
110 = divided by 16
Description
8-72
Description
Description
LatticeECP2M SERDES/PCS Usage Guide
Unlock
+/-1500ppm x2
+/-2500ppm x2
+/-7000ppm
+/-450ppm
Description
Unlock
+/-600ppm x2
+/-2000ppm
+/-2200ppm
+/-6000ppm
001 = reserved
011 = reserved
101 = divided by 8
111 = divided by 32
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Type
R/W
R/W
R/W
R/W
Default
Default
Default
3’b000
Default
2’b10
2’b00
3’b000
3’b000
2’b00
0
0
1