Abort Switch (S1); Table 3-2. P2 Multiplexing Sequence - Motorola MVME2700 Series Installation And Use Manual

Functional Description
3

ABORT Switch (S1)

3-18
A 16-to-1 multiplexing scheme is used with MXCLK's 10 MHz bit rate.
16 time slots are defined and allocated as follows:

Table 3-2. P2 Multiplexing Sequence

MXDO (From Base Board)
Time Slot Signal Name
0
1 DTR3
2 LLB3/MODSEL
3 RLB3
4
5 DTR4
6 LLB4
7 RLB4
8 IDREQ
9 DTR1
10 DTR2
11 Reserved
12 Reserved
13 Reserved
14 Reserved
15 Reserved
The switch is located on the LED mezzanine. It can be actuated by
ABORT
software as well as by hand. When enabled by software, the
can generate an interrupt signal to the processor. The interrupt is normally
used to abort program execution and return control to the debugger
firmware located in the MVME2700 EPROM and Flash memory. The
interrupt signal reaches the processor module via ISA bus interrupt line
∗
IRQ8 . The signal is also available at pin PB7 of the Z8536 CIO device,
which handles various status signals, serial I/O lines, and counters.
MXDI (From MVME761)
Time Slot
RTS3
RTS4
∗
10
11
12
13
14
15
Computer Group Literature Center Web Site
Signal Name
0 CTS3
1 DSR3/MID1
2 DCD3
3 TM3/MID0
4 RI3
5 CTS4
6 DSR4/MID3
7 DCD4
8 TM4/MID2
9 RI4
RI1
DSR1
DCD1
RI2
DSR2
DCD2
ABORT
switch