COPheader.pdf

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Including COP in Designs
The Common On-Chip Processor functionality can be very useful for debugging systems. However, to
use this feature, certain signals must be accessible. Therefore, access to these signals must be included
in the design.
To facilitate board debugging, several key signals should be pulled out from the part, either to test points
or to a 16-pin header (2x8). This header should be composed of .025in. square posts at .100in. spacing
and is shown below in Figure 1. These pins enable COP functions to be performed on the system under
test (SUT) and is used by third party tool providers to attach their emulator products to PowerPC
Microprocessors in the MPC6XX and MPC7XX families. Figure 1 below shows the 16-pin header as it
should appear on the printed circuit board. Pin #14 (blacked out in the diagrams below) is the key locator
pin for the connector. Depending on the emulator being used, the key location may need to be de-
populated (ie. emulator connector may not have a receptacle at this location).
Pin #14 Key
2
1
16
15
.025 in. square post
.100 in. spacing
Figure 1 . CO P Conne ctor
Table 1 shows information for the connection of signals to the 16-pin header. Note that N/C means No
Pin
ESP Connector
Pull up/down
I/O
16
GND
15
CKSTP_OUT
I
14
Key
13
HRST
10K pull up
O
12
GND
11
SRST
10K pull up
O
10
N/C
9
TMS
10K pull up
O
8
N/C
7
TCK
10K pull up
O
6
VDD (from processor OVDD)
5
HALTED*
I
4
TRST
10K pull down
O
3
TDI
10K pull up
O
2
QACK**
O
1
TDO
I
* HALTED from the processor if present (ie. MPC604 family)
** QACK from processor if present (ie. MPC603, MPC603e, MPC7XX family)
Table 1. 16 Pin Header Pinout
Connection. The VDD connection on pin #6 should be at the same voltage as the OVdd of the
microprocessor and is used by emulator tools to determine which voltage level to drive their output pins.
The VDD pin should be capable of sourcing 16mA. The “I/O” column in Table 1 shows “I - input” and “O -
output” from the emulator tools perspective.
For more information please contact your Motorola Field Applications Engineer at your nearest Motorola
Sales office.

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