2.22 JTAG/COP port
The JTAG connection is provided by a direct connection to the appropriate header
connector. The Common on-chip processor (COP) is part of the T1023 processor’s JTAG
module, and it is implemented as a set of additional instructions and logic. This port can
connect to a dedicated emulator for extensive system debugging. Several third-party
emulators in the market can connect to the host computer through the Ethernet port, USB
port, parallel port, or RS-232. A setup using a USB port emulator is shown in the below
figure.
PC
USB Port
USB
Emulator
COP Port
T1023RDB-PC
Figure 2-15. USB port emulator setup
The 16-pin generic header connector carries the COP/JTAG signals and connect T1023
using level shift and the additional signals for system debugging. The pin-out of this
connector is shown in the below figure.
JTAG
T1023
CKSTP_OUT
HRESET_B
SRESET_B
TMS
TCK
NC
TDI
TDO
1
NC
TRST_B
VDD_SENSE
CKSTP_IN
NC
GND
NC
GND
Figure 2-16. RDB COP connector
The table below displays the connections made from the T1023RDB COP connector.
Table 2-9. T1023RDB COP connector
Pin number
Signal name
Connection
1
TDO
Connected directly between the processor and JTAG/COP connector.
2
NC
Not connected.
3
TDI
Connected directly between the processor and JTAG/COP connector.
Table continues on the next page...
Chapter 2 Architecture
QorIQ T1023 Reference Design Board User Guide, Rev. 0, 08/2015
Freescale Semiconductor, Inc.
27
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