Document type:
Title:
Revision date:
Revision:
User's Manual (MUT)
Mod. DT5740 32 Channel 12bit - 65MS/s Digitizer
04/05/2016
12
NPO:
Filename:
Number of pages:
Page:
00100/09:5740x.MUTx/12
DT5740_REV12.DOC
50
10
2.3
Cooling Management
Starting from revision 4 of the hardware (readable at 0xF04C address of the Configuration ROM),
the DT5740 features an automatic fan speed control to guarantee an appropriate cooling in
consequence of internal temperature variations. The automatic control is managed by the ROC
FPGA firmware from revision 4.4 on.
The user can manually set the fan speed through the bit[3] of the Fan Speed Control register:
Hardware revision ≥ 4 and ROC FPGA firmware revision ≥ 4.4
Bit[3] = 0 (default) sets the automatic fan speed control;
Bit[3] = 1 sets HIGH the fan speed.
Hardware revision < 4 and ROC FPGA firmware revision < 4.4
Bit[3] = 0 (default) sets LOW the fan speed;
Bit[3] = 1 sets HIGH the fan speed.
WARNING: It is recommended not to run ROC FPGA firmware revision < 4.4 on DT5740
with hardware revision ≥ 4 as the fans will work always at the maximum speed to prevent from
hardware damages, but with a high noisiness on the other hand.