Debug Header; Table 4-6. J1 Debug Header Pin Assignments - Motorola PRPMC750 Installation And Use Manual

Debug Header

A 2mm, 20-pin right-angle header, located on side 1 of the PrPMC750,
provides the interface to the async serial port and the processor JTAG/COP
port, along with the RESET# and ABORT# signals. The Serial port and
JTAG/COP interfaces, along with the ABORT_L signal, are also routed to
the PMC P14 connector for carrier board access. The pin assignments for
this header are as follows.

Table 4-6. J1 Debug Header Pin Assignments

Signal Description for J1
TXD:
RXD:
CPUTDI:
CPUTDO:
CPUTRST_L:
CPUTCK:
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J1
1 CPUTDO
3 CPUTDI
5 RSVD
7 CPUTCK
9 CPUTMS
11 SRESET_L
13 CPURST_L
15 CKSTPO_L
17 RESET_L
19 TXD
RS232 serial port transmit data
RS232 serial port receive data
Processor RISCwatch TDI
Processor RISCwatch TDO
Processor RISCwatch Test Reset
Processor RISCwatch Test Clock
RSVD 2
CPUTRST_L 4
PULLUP 6
RSVD 8
RSVD 10
DEBUGINT_L 12
GND 14
GND 16
ABORT_L 18
RXD 20
Debug Header
4
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