VICOR PI33 EVAL1 Series, User Manual

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UG:309 Page 4
Software Installation and Operation
Users downloading the Buck GUI should save the compressed file in a desired directory. The user should
unzip the compressed file and run the executable installation file “PicorBuckGuiFull_setup.exe”. The
installer will then install the Buck GUI in either the default Programs directory or to a directory specified
by the user. Once the software is installed, the user should next plug in the LinkM™ into a dedicated
USB port. The LinkM will detect and use a valid driver without the need of installing one. If the LinkM
device is not detected, the user should consult the LinkM homepage . If the LinkM is not installed, the
Buck GUI will not start and an error message will be generated like the one shown in Figure 3.
Successful installation of the LinkM Interface should result in a successful start up screen of the Buck
GUI as shown in Figure 4. First a dialog box will pop up indicating proper detection of the LinkM. When
the user clicks the “OK” button, that box will disappear. The Buck GUI program screen will appear as
shown in the bottom half of Figure 4.
Table 2
User‑accessible registers
Table 3
I
2
C™ port specifications
Figure 3
Error message due to missing
LinkM upon software start
Name Address HEX # Bits Description
TSTMDE[2:0] 18 3 Test mode register used for burning bits into non‑volatile memory
MRGN[3:0] 19 4 Volatile register for output voltage margining
FLT[7:0] 1A 8 Fault Register read only
FREG_CLR 1B 0 Register for clearing the Fault Register‑writing address clears register
ENA_POL 20 1 EN pin polarity programming bit
SYN[3:0] 21 4 SYNC programming. SYN[3] = SYNC polarity
KBIT2 22 1
User kill bit for SYN[3:0] and ENA_POL – can not be reversed;
register is write only, can not be read
Parameter Conditions Min Typ Max Units
SCL, SDA V
IH
Rising, 3.3V & 5V bus compatible 2.1 V
SCL, SDA V
IL
Falling 3.3V & 5V bus compatible 1.5 V
SCL, SDA input current
(sink to hold open pins low)
At 5V 1.8 5 10 µA
SDA V
OL
3mA 0.4 V
ADDR0,1V
MID
V
CC
= PI33xx‑xx fixed, internal 5.1V 0.4V
CC
0.6V
CC
V
ADDR0,1V
IH
V
CC
= PI33xx‑xx fixed, internal 5.1V 0.8V
CC
V
ADDR0,1V
IL
V
CC
= PI33xx‑xx fixed, internal 5.1V 0.1V
CC
0.2V
CC
V
ADDR0,1 hysteresis 0 mV
ADDR0,1 Output resistance
from ½ V
CC
0.3V
CC
< ADDRx < 0.7V
CC
V
CC
= PI33xx‑xx fixed, internal 5.1V
6k kΩ
ADDR0,1 Output resistance
from ½ V
CC
ADDRx < 0.2V
CC
, ADDRx > 0.8V
CC
V
CC
= PI33xx‑xx fixed, internal 5.1V
70k kΩ