DRM33395 Datasheet, PDF (26/44 Pages) Motorola, Inc – ANALOG ICs 33395 EVALUATION MOTOR BOARD DESIGNER REFERENCE MANUALv

Pin Descriptions
Freescale Semiconductor, Inc.
3.3.5 Test Points
Ten test points provide easy access to the power supply, reference
voltages and other circuits. They are listed in Table 3-5 with their
descriptions and locations. Additional test points appearing left of the
UNI-3 connector are numbered adequately to UNI-3 pin numbers and
explained in Table 3-1.
Table 3-5 Test Points
Point
No.
Signal Name
The Test/Measurement point is connected to:
1 DCB_POS (MP1) the +12-volt motor bus
2
GND (MP2) the 12-volt power supply and motor bus ground
3
+5V_D (MP3) the 5-volt digital power supply voltage
4
+3.3V_A (MP4) the 3.3-volt analog power supply voltage
5
GND (MP5) the 12-volt power supply and motor bus ground
6
GNDA (MP6) the analog ground
7
1.65VREF
the 1.65-volt analog reference voltage
8
DCB_HALF Back-EMF zero crossing circuitry
9
BRAKE
the gate of the brake’s transistor
10 l_reconst (TP22) pin 22 of UNI-3 connector, see Table 3-1
Location
above green LED diode
below J2 - motor connector
above UNI-3 connector
on top right corner
on top left side of UNI-3
connector
in the middle, above SMOS
above MP3, below MP4
right of MP1, below SMOS
above MP1
left of trimmer and MP3
DRM33395 Designer Reference Manual
33395 Evaluation Motor Board
24
Pin Descriptions
MOTOROLA
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