TC1796
Peripheral Units (Vol. 2 of 2)
General Purpose Timer Array (GPTA)
User’s Manual
24-250
V2.0, 2007-07
GPTA, V2.0
24.6.3
Port Control and Connections
This sections describes the I/O control and selections of the GPTA0/GPTA1/LTCA2
modules.
24.6.3.1 I/O Group to Port Line Assignment
In the TC1796, the seven I/O groups of GPTA0 and GPTA1 with their input lines IN[55:0]
and output lines OUT[55:0] are assigned to seven 8-bit port groups as shown in
. Within an 8-bit I/O group, the IN/OUT line with lowest index number is
assigned to the port line with the lowest index number. The remaining lines are assigned
linearly with increasing index numbers. For example, P3.5 is assigned to IN13/OUT13.
In the LTCA2, only 40 input/output lines are available. Therefore, the LTCA2 does not
have IOG5 and IOG6 and therefore it has no connections to Port 8 or Port 9 pins.
Figure 24-88 I/O Group to Port Assignment
MCA05997
8
IOG0
Port Control
[7:0]
[7:0]
[7:0]
[7:0]
IOG1
[8:15]
[8:15]
[8:15]
[8:15]
IOG2
[23:16]
[23:16]
[23:16]
[23:16]
IOG3
[31:24]
[31:24]
[31:24]
[31:24]
IOG4
[39:32]
[39:32]
[39:32]
[39:32]
IOG5
[47:40]
[47:40]
[47:40]
IOG6
[56:48]
[56:48]
[56:48]
IN[55:0]
P2.[15:8]
P3.[7:0]
P3.[15:8]
P4.[7:0]
P4.[15:8]
P8.[7:0]
P9.[7:0]
8
8
8
8
8
8
OUT[55:0] (from GPTA0)
OUT[55:0] (from GPTA1)
OUT[39:0] (from LTCA2)
