TAM-3517 HARDWARE MANUAL rev B
July 3 2012, TechNexion
53
8.4
Test Interfaces – JTAG Signals Description
The target debug interface of the device uses the five standard IEEE 1149.1 (JTAG) signals
(nTRST, TCK, TMS, TDI, and TDO), a return clock (RTCK) to meet the clocking requirements of
the ARM968 processor, and two instrumentations pins (EMU0, EMU1).
Schematic of the JTAG signals
SIGNAL NAME
DESCRIPTION
TYPE
Jtag_ntrst
Test reset
I
Jtag_tck
Test Clock
I
Jtag_rtck
ARM Clock emulation
O
Jtag_tms_tmsc
Test Mode Select
IO
Jtag_tdi
Test Data Input
I
Jtag_tfo
Test data Output
O
Jtag_emu0
Test emulation 0
IO
Jtag_emu1
Test emulation 1
IO
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