PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 195

• 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

T3 is clocked by each transition on one or both of the external input lines which gives 2-
fold or 4-fold resolution of the encoder input.
Figure 14-6 Block Diagram of Core Timer T3 in Incremental Interface Mode
Bit field T3I in control register T3CON selects the triggering transitions (see table below).
In this mode the sequence of the transitions of the two input signals is evaluated and
generates count pulses as well as the direction signal. Depending on the chosen
Incremental Intrerface Mode, Rotation detection ‘110
interrupt can be generated. This interrupt is only generated if it’s enabled by setting bit
T3IREN in register T3CON. For the Rotation detection an interrupt will be generated
each time the count direction of timer 3 changes. For the Edge detection an interrupt will
be generated each time a count action for timer 3 occurs. Count direction, changes in
the count direction and count requests are monitored through the status bits T3RDIR,
T3CHDIR and T3EDGE in register T3CON. T3 is modified automatically according to the
speed and the direction of the incremental encoder. Therefore, the contents of timer T3
always represents the encoder’s current position.
Table 14-4
T3I
0 0 0
0 0 1
0 1 0
Data Sheet
T3IN
T3EUD
Core Timer T3 (Incremental Interface Mode) Input Edge Selection
Triggering Edge for Counter Increment / Decrement
None. Counter T3 stops.
Any transition (rising or falling edge) on T3IN.
Any transition (rising or falling edge) on T3EUD.
Phase detect
Edge detect
T3I
T3UD
T3R
XOR
195
T3UDE
MUX
T3
Up/Down
B
’ or Edge Detection ‘111
General Purpose Timer Unit
T3OTL
T3IR
T3OE
PSB 21473
2003-03-31
INCA-D
T3OUT
B
’, an