SNAU288 December 2023 LMX1906-SP
Test Point | Net |
---|---|
TP1 | SDO |
TP4 | CSB |
TP5 | SCK |
TP6 | SDI |
TP9 | CE |
Test Point | Net |
---|---|
TP10 | SDA |
TP11 | SCL |
Test Point | Net |
---|---|
TP7 | VCC01_23 |
TP12 | VCC_CLK_LOGIC |
TP14 | VCC_PinM |
TP16 | VCC_BIAS |
Header | Net | Short Position | Configuration |
---|---|---|---|
J14 |
CE |
1-2 (EVM default) |
CE pulled high via 10 kΩ resistor results in LMX1909-SP enabled |
2-3 |
External CE signal from USB2ANY in TICSpro 'pin' tab |
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J28 | VCC_BYPASS or 1st LDO |
2-3 (EVM default) |
Use on-board LDOS |
1-2 |
Direct Supply from J23 (VCCIN) SMA connector |
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J29 | VCC_IN or VCC_BYPASS | 2-3 (EVM default) | Use on-board LDOS |
1-2 |
Direct Supply from J23 (VCCIN) SMA connector | ||
J40 | VCC_IN or 2nd LDO | 2-3 (EVM default) | Use on-board LDOS |
1-2 | Direct Supply from J23 (VCCIN) SMA connector |
Jumper | Short position | Configuration |
---|---|---|
SYSREFEN (Acts as CE pin for entire SYSREF sub-system) |
J38-J39 (Pulled HIGH) |
When SYSREFEN is set to HIGH, the entire SYSREF sub-system is enabled with register defaults set accordingly. SPI can still be used to disable. |
J37-J38 (Pulled LOW) |
When SYSREFEN is set to low, the entire SYSREF sub-system is deactivated and SPI cannot re-enable. |
|
LOGICEN (Acts as CE pin for LOGICH) |
J38-J39 (Pulled HIGH) |
When LOGICEN is set to HIGH, the entire SYSREF sub-system is enabled with register defaults set accordingly. SPI can still be used to disable. |
J37-J38 (Pulled LOW) | When LOGICEN is set to low, all FPGA/LOGIC circuits and the SYSREF sub-system are deactivated and SPI cannot re-enable. |
Header | Short Position | Configuration |
---|---|---|
PWRSEL[2:0] | 000 | Output power configurable via SPI |
001 - Lowest output power | Pin Mode (Also controllable via IO expander) | |
⋮ | ||
111 - Highest Output Power | ||
CLKx_EN | Pulled LOW (GND) J31-J32 | Disables corresponding CLKOUTx |
Pulled HIGH (VCC) J32-J33 | Enables corresponding CLKOUTx | |
CAL | Transition from LOW to HIGH | Calibrates the multiplier or Resets the divider |
LOW | Calibration & Reset controllable via SPI |
The onboard TCA9535 IO expander allows the user to change pin states without the need of physical shorts on the header pin. This allows users to toggle pin modes through the GUI as well. If the user wishes to evaluate the LMX1906-SP without MCU control (physical pin strapping), then make sure no jumpers are present on any of the pin state headers.
USB POWER needs to be provided if LDOs utilization is desired. VCCIN can have a 3.3 V supply connected but, if the USB cable is disconnected, then the board is without power.
Usage | Configuration |
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With USB & DUT LDOs |
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Without USB & DUT LDOs |
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With USB & DUT LDOs bypassed |
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Without USB & DUT LDOs bypassed |
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