EJTAG
⚠️ Todo: This page needs some editing. EJTAG = E? Joint Test Action Group
Use for debugging and programming of MIPS processors.
EJTAG 2.6
| Pin | Name | |
|---|---|---|
| 1 | nTRST | TAP reset |
| 2 | GND | Ground |
| 3 | TDI | Test Data In |
| 4 | GND | Ground |
| 5 | TDO | Test Data Out |
| 6 | GND | Ground |
| 7 | TMS | Test Mode Select |
| 8 | GND | Ground |
| 9 | TCK | Test Clock |
| 10 | GND | Ground |
| 11 | nSRST | System reset |
| 12 | n/a | (key) |
| 13 | DINT | Raise Debug Interrupt |
| 14 | Vcc | Power |
Truncated EJTAG
Seems, this header is a truncated version of the full EJTAG header. Found in Linksys routers such as the WRT54G and WRT54GS.
| Pin | Name | |
|---|---|---|
| 1 | nTRST | TAP reset |
| 2 | GND | Ground |
| 3 | TDI | |
| 4 | GND | Ground |
| 5 | TDO | |
| 6 | GND | Ground |
| 7 | TMS | |
| 8 | GND | Ground |
| 9 | TCK | |
| 10 | GND | Ground |
| 11 | nSRST | System reset |
| 12 | GND | Ground |
Technical description
TDI
TDI = Test Data In
TDO
TDO = Test Data Out
TCK
TCK = Test Clock
TMS
TMS = Test Mode Select
TRST
TRST = Test ReSeT
Optional.