LCMXO2-4000HE-DSIB-EVN Lattice, LCMXO2-4000HE-DSIB-EVN Datasheet - Page 6

• Manufacturer Part Number: LCMXO2-4000HE-DSIB-EVN
• Description: Programmable Logic IC Development Tools MachXO2 Dual Sensor Interface Board
• Manufacturer: Lattice
• Type: FPGAr

Specifications of LCMXO2-4000HE-DSIB-EVN

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: LCMXO2-4000
• Interface Type: Parallel, Serial
• Operating Supply Voltage: 5 V
• Description/function: MachXO2 Dual Sensor Interface Board
• Dimensions: 113 mm x 65 mm
• Maximum Operating Temperature: + 55 C
• Minimum Operating Temperature: 0 C
• Factory Pack Quantity: 1
• For Use With: LFE3-70EA-HDR60-DKN

Lattice Semiconductor
a Panasonic MN34041 NanoVesta board, revert the board to the default configuration on the DSIB and plug the
Panasonic board into sensor location #1.
I
Jumpers J14, J15 and J16 can be used for the LatticeECP3 device on the HDR-60 Base Board to configure the
sensor in location #1. No demo code is available to support this programming, but inserting these jumpers allows
the option to bypass the MachXO2 device for I
support sensor #2. The default configuration does not have these jumpers set.
MachXO2 I
The last possible configuration is one that allows a user to access the hard I
device. This built-in I
tion on the DSIB has J21 pins 1 and 2 shorted with a zero ohm resistor. For I
the resistor between pins 1 and 2 on J21 must be removed. Then pins 2 and 3 must be shorted on J21 with a zero
ohm resistor. Note that when the board is modified for I
MachXO2 Device
This board features a MachXO2-4000 FPGA with a 1.2V DC core in a 132-ball csBGA package. The MachXO2-
1200, -2000 and -4000 device densities in this package can be accommodated with no change in pin connections,
although some features are not supported in the smaller density devices. A complete description of this device can
be found in the
Power Connections
The board is supplied 5V power from the HDR-60 Base Board connectors, J7 and J8. To power the DISB, a 5V
supply can be applied to TP70 (+5V) and TP90 (GND). On-board step-down switching regulators then provide the
necessary supply voltages: 3.3V, 2.5V, 1.8V and 1.2V.
The on-board switching regulator output voltages can be measured at test points located around the board as
shown in Table 1.
Table 1. Test Points for On-Board Regulator Voltages
Each of the step-down switching regulators, U10 and U11, incorporate typical resistor divider voltage feedback to
divide-down the regulator output voltage and compare it against an internal reference voltage. The regulator then
adjusts the output voltage higher or lower such that the resistor divided voltage matches the internal reference. By
doing this, the regulator output voltage remains at a constant voltage value independent of the load driven. The
regulator output voltages are set by the ratio of the feedback resistor values shown in Table 1, multiplied by the reg-
ulator internal reference voltage. See the LT3508 device data sheets for additional details about these devices.
The 2.5V regulator output voltage can also be set to 1.8V or 3.3V by adding a shorting jumper on J6, as shown in
Table 1. With no jumper on J6, the voltage divider is set by R53 and R5 and this divider sets up a nominal 2.5V out-
put voltage. When a shorting jumper is added to J6, the R56 and R51 resistors will be placed in parallel with either
R53 or R5, which then changes the resistor divider ratio, and this changes side 1 of the U10 regulator output volt-
2
C Sensor Bypass Configuration
Supply
3.3V
2.5V
1.8V
1.2V
2
C Embedded Function Block Configuration
MachXO2 Family Data
U10 (side 2)
U10 (side 1)
U11 (side 2)
U11 (side 1)
Switching
Regulator
2
C function is in the Embedded Function Block of the MachXO2 device. The default configura-
Test Point
TP67
TP68
TP66
TP69
Sheet.
2
C programming of sensor location #1 only. The bypass does not
R46, R45
R53, R5, R56, R51
R57, R58, R59, R6
R54, R52
Feedback Resistors
2
C support, sensor location #2 is not supported.
6
MachXO2 Dual Sensor Interface Board
1.8V: jumper on J6 pins 1-2
2.5V: no jumper on J4 (default)
3.3V: jumper on J6 pins 2-3
1.8V: jumper on J20 pins 1-2 (default)
2.5V: no jumper on J20
3.3V: jumper on J20 pins 2-3
2
C Embedded Function Block support,
2
C logic resident in the MachXO2
Comment
User’s Guide