User's Manual

8/13 Rev1.2
5. JTAG & Reset
Emulation JTAG is used to debug and run SW on embedded MIPS processors.
MESSI has a single Reset input (RSTN). This signal should be connected and driven by
the power management unit or the host application processor, depending on the usage
scenario.
Pin NO.
Pin name
Description
42
TCK
Clock
43
TMS
Test Mode
47
TDI
Input Data
49
TDO
Output Data
53
EJTAG_TRST
EJTAG Reset
67
TRST
MESSI Reset Input(1.8V)
Figure 6-1: JTAG connection