XC886/888CLM
On-Chip Debug Support
User’s Manual
17-11
V1.3, 2010-02
OCDS, V 1.0
17.5.2
Input Select Registers
Bits MODPISEL.JTAGTCKS and MODPISEL1.JTAGTCKS1 are used to select one of
the three TCK inputs while bits MODPISEL.JTAGTDIS and MODPISEL1.JTAGTDIS1
are used to select one of the three TDI inputs.
MODPISEL
Peripheral Input Select Register
Reset Value: 00
H
7
6
5
4
3
2
1
0
0
URRISH
JTAGTDIS
JTAGTCK
S
EXINT2IS
EXINT1IS
EXINT0IS
URRIS
r
rw
rw
rw
rw
rw
rw
rw
Field
Bits
Type Description
JTAGTCKS
4
rw
JTAG TCK Input Select
0
JTAG TCK Input TCK_0 is selected.
1
JTAG TCK Input TCK_1 is selected.
JTAGTDIS
5
rw
JTAG TDI Input Select
0
JTAG TDI Input TDI_0 is selected.
1
JTAG TDI Input TDI_1 is selected.
0
7
r
Reserved
Returns 0 if read; should be written with 0.
MODPISEL1
Peripheral Input Select Register 1
Reset Value: 00
H
7
6
5
4
3
2
1
0
EXINT6IS
0
UR1RIS
T21EXIS
JTAGTDI
S1
JTAGTCK
S1
rw
r
rw
rw
rw
rw
Field
Bits
Type Description
JTAGTCKS1
0
rw
JTAG TCK Input Select 1
0
JTAG TCK Input TCK_2 is not selected.
1
JTAG TCK Input TCK_2 is selected.
Note: If this bit is set, JTAG TCK input TCK_2 is
selected regardless of the bit JTAGTCKS in
register MODPISEL.
*