Infineon Technologies TC1784, User Manual

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TC1784
General Purpose Timer Array (GPTA
®
v5)
User´s Manual 21-238 V1.1, 2011-05
GPTA
®
v5, V1.14
The LTC input multiplexer contains LTC input Multiplexer Groups (LIMGs) that connect
the I/O groups or the clock, PDL, or INT inputs to the input lines of the LTCs, organized
in four LTC groups with 8 cells each. IOGs are grouped into four IOGs (IOG[3:0]) with
eight lines each. Two special groups are available, a clock group with eight lines
representing the clock bus inputs CLK[7:0] and a PDL/INT group with eight outputs that
combines the four PDL inputs and the four inputs INT[3:0] as a group of LIMGs inputs.
Figure 21-88 shows the logical structure of a LIMG.
Figure 21-88 LTC Input Multiplexer Group (LIMG) Structure
Rules for connections to LTC Input Multiplexer Group LIMG:
•
Within a I/O group, the line or the output of the cell with the lowest index number is
connected to LIMG input line IN0. The remaining lines, cells or lines of a group are
connected to LIMG input lines IN1 to IN7 with ascending index numbers. At the clock
group, CLK0 is connected to IN0 and the remaining clock lines are connected to
LIMG input lines IN1 to IN7 with ascending index numbers. At the PDL/INT group,
PDL[3:0] (see
Page 21-22 ) are connected to IN[3:0] and INT[3:0] are connected to
IN[7:4].
Example: for LIMG04 (see
Figure 21-87 ), the I/O lines of IOG0 (IN00 up to IN07) are
wired to its input lines IN0 to line IN7.
• Multiplexer output OUT0 of a LIMG is always connected to the input of an LTC group
with the lowest index. The remaining output lines OUT1 to OUT7 are connected to
the LTC inputs with ascending index.
Example: for LIMG04 (see
Figure 21-87 ), the outputs OUT0 to OUT7 are wired to
the inputs of LTC32 to LTC39.
• An LTC input can be connected either to an I/O group output, or to a clock bus output,
or to an PDL/INT output. This is guaranteed by the LIMG control register layout.
MCA05990
From other LIMGs
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
Outputs of an
I/O Group or
CLK Group or
PDL/INT Group
To other
LIMGs
OU
T
0
OU
T
1
OU
T
2
OU
T
3
OU
T
4
OU
T
5
OU
T
6
OU
T
7
To LTC Groups More than one switch
might be closed per row,
only one switch can be
closed per column