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Signal description (JTAG communication)
Below shows description of I/O signal from target side during JTAG communication
(”I/O” means input and output direction from view of probe side.)
Signal
Name
JTAG
Mode
Meaning I/O Type
IO1
TCK TCK output of JTAG O A
IO2
TDI Transmitted data output of JTAG O(I/O) A
IO3
TDO Received data input of JTAG I(I/O) A
IO4
TMS TMS output of JTAG O(I/O) A
IO5
nTRST nTRES output of JTAG O(I/O) A
IO6
TAUX2
I/O terminal (definition varies according to definition program) I/O A
IO7
TAUX3
I/O terminal (definition varies according to definition program) I/O A
IO8
TAUX4
I/O terminal (definition varies according to definition program) I/O B
IO9
TMODE
I/O terminal (definition varies according to definition program) I/O B
IO10
/TICS
I/O terminal (definition varies according to definition program) I/O B
VCC
5V output (MAX 100mA) O C
/TRES
Re-set output of negative logic (open collector output) (*1) O D
WDT Watchdog timer output (open collector output) (*1) O D
TVccd User power input (driver power for I/F) I E
PROBE SELECT Terminal selection signal of target probe I F
GND GND － －
*1 /TRES, WDT are open collector signal with 1MΩ pull down.
Please note that no voltage output to target side.
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