TC1796
Peripheral Units (Vol. 2 of 2)
General Purpose Timer Array (GPTA)
User’s Manual 24-102 V2.0, 2007-07
GPTA, V2.0
permissible for an I/O group output, or an LTC output, or an FPC/INT output to be
connected to more than one GTC input.
The GTC input multiplexer group configuration is based on the following principles:
• Each GIMG is referenced with two index variables: n and g (GIMGng)
• Index n is a group number. I/O groups IOG[3:0] have group number 0, I/O groups
IOG[6:4] have group number 1, Local Timer Cell Groups LTCG[3:0] have group
number 2, Local Timer Cell Groups LTCG[7:4] have group number 3, and the
FPC/INT group has group number 4.
• Index g indicates the number of the GTC group g (g = 0-3) to which the outputs of the
input multiplexer group GIMGng are connected.
The GTC input multiplexer logic as seen for programming is shown in Figure 24-67. With
this logic, five group signals (from an I/O group, LTC group, or FPC/INT group) are
always combined to one output line that leads to the input of a GTC of GTC group g. For
example, when looking at Figure 24-66, each of the eight GTC input multiplexer output
lines to GTC group GTCG2 is connected via five OMGn2 (n = 0-4) with the eight outputs
of two I/O group (IOG2 and IOG6), two LTC groups (LTCG2 and LTCG6), and the
FPC/INT group.
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