PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 196

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
Table 14-4
T3I
0 1 1
1 X X
The incremental encoder can be connected directly to the microcontroller without
external interface logic. In a standard system, however, comparators will be employed
to convert the encoder’s differential outputs (e.g. A, A) to digital signals (e.g. A). This
greatly increases noise immunity.
Note: The third encoder output T0, which indicates the mechanical zero position, may
Figure 14-7 Interfacing the Encoder to the Microcontroller
For incremental interface operation the following conditions must be met:
l Bitfield T3M must be ’110
l Pins associated to lines T3IN and T3EUD must be configured as input.
l Bit T3UDE must be ’1’ to enable automatic direction control.
The maximum input frequency which is allowed in incremental interface mode is f
(FM = 1). To ensure that a transition of any input signal is correctly recognized, its level
should be held high or low for at least 4 f
In Incremental Interface Mode the count direction is automatically derived from the
sequence in which the input signals change, which corresponds to the rotation direction
of the connected sensor. The table below summarizes the possible combinations.
The figures below give examples of T3’s operation, visualizing count signal generation
and direction control. It also shows how input jitter is compensated which might occur if
the sensor rests near to one of its switching points.
be connected to an external interrupt input and trigger a reset of timer T3.
Core Timer T3 (Incremental Interface Mode) Input Edge Selection
Triggering Edge for Counter Increment / Decrement
Any transition (rising or falling edge) on any T3 input (T3IN or T3EUD).
Reserved. Do not use this combination
External
Encoder
T0
T0
A
A
B
B
B
’ or ‘111
B
’.
Timer
Signal Conditioning
196
cycles (FM = 1) before it changes.
+
+
+ -
-
-
A
B
T0
General Purpose Timer Unit
T3input
T3input
Interrupt
Micro-
controller
PSB 21473
2003-03-31
INCA-D
Timer
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