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Connector Pin Assignments
2
Note
CPU Connector (J2)
This 190-pin SMT connector with a center row of power and ground pins
is used to provide access to the processor bus (MPU bus) and some
MPC105 signals. This CPU connector may be used to add L2 cache or to
upgrade the processor.
Pin numbers and signal mnemonics for J2 are shown in Table 2-2.
2-2
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Table 2-1. RISCWatch Header J1 (Continued)
Header J1
MPC603 Pin No.
Pin No.
(240-pin QFP)
14
15
216
16
QACK_ signal on the MPC603 has a 1K-ohm pull-down resistor to
allow the MPC603 processor to enter the state required for reading
and writing SCAN string data.
Table 2-2. CPU Connector Pin Assignments (J2)
1
PA0
3
PA2
5
PA4
7
PA6
9
PA8
11
PA10
13
PA12
15
PA14
17
PA16
19
PA18
MPC603
Signal Name
I/O
KEY
OUT
CHECKSTOP
_
GND
PA1
PA3
PA5
PA7
PA9
PA11
PA13
PA15
PA17
GND
PA19
Resistor
10K pullup
2
4
6
8
10
12
14
16
18
20
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