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TS4
Test access port (TAP)
Pin
TDI
TDO
TMS
TCK
notTRST
PIO pins and alternative functions
Table 1 shows the assignment of the alternative functions to the PIO bits. Parentheses ( ) in the
table indicate suggested or possible pin usages as a PIO, not an alternative function connection.
Port
PIO port 0
bit
ASC0TxD or
0
Sc1DataOut
ASC0TRxD or
1
Sc1DataIn
2
Sc1ClkGenExtClk
3
Sc1Clk
4
(Sc1RST)
5
(Sc1CmdVcc)
(Sc1CmdVpp)
6
Sc1Dir
7
(Sc1Detect)
60
In/Out
Function
in
Test data input.
out
Test data output.
in
Test mode select.
in
Test clock.
in
Test logic reset.
Alternative function of PIO pins
PIO port 1
ASC2TxD
SSC0 MTSR
or Sc0DataOut
ASC2RxD
SSC0 MRST
or Sc0DataIn
SSC0 SClk
Sc0ClkGenExtClk
PWMOut0
Sc0Clk
PWMOut1
(Sc0RST)
ASC1TxD
(Sc0CmdVcc)
(Sc0CmdVpp)
ASC1RxD
Sc2Dir
PWMOut2
(Sc0Detect)
Table 1 Alternative functions of PIO pins
PIO port 2
PIO port 3
SSC1 MTSR
SSC1 MRST
SSC1 SClk
CaptureIn0
CaptureIn1
CaptureIn2
CompareOut2
1284InnotOut
PIO port 4
ASC3TxD
ASC3RxD
TtxtClockIn
1284PeriphLogicH
1284HostLogicH
Interrupt2
Interrupt3
TtxtData
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