User manual

Chapter 3
VMEbus Interface
3-3
Table 3.A shows the usage of the VMEbus signals on the P1 connector.
T able 3.A
VMEbus Signals on the P1 Connector
Row A Row B Row C
Pin Name
Use
❷
Name
Use
❷
Name
Use
❷
1 D00 IO
BBSY
❶
IO D08 IO
2 D01 IO
BCLR
❶
I D09 IO
3 D02 IO
ACFAIL
❶
I D10 IO
4 D03 IO
BG0IN
❶
I D11 IO
5 D04 IO
BG0OUT
❶
O
❹
D12 IO
6 D05 IO
BG1IN
❶
I D13 IO
7 D06 IO
BG1OUT
❶
O D14 IO
8 D07 IO
BG2IN
❶
I D15 IO
9 GND G
BG2OUT
❶
O
❹
GND G
10 SYSCLK
O
❸
BG3IN*
❶
I
SYSFAIL
❶
IO
11 GND G
BG3OUT
❶
O
BERR
❶
IO
12
DS1
❶
IO
BR0
❶
SYSRESET
❶
IO
13
DS0
❶
IO
BR1
❶
O
LWORD
❶
IO
14
WRITE
❶
IO
BR2
❶
AM5 IO
15 GND G
BR3
❶
IO A23 IO
16
DTACK
❶
IO AM0 IO A22 IO
17 GND G AM1 IO A21 IO
18
AS
❶
IO AM2 IO A20 IO
19 GND G AM3 IO A19 IO
20
IACK
❶
IO GND G A18 IO
21
IACKIN
❶
I SERCLK A17 IO
22
IACKOUT
❶
O
SERDAT
❶
A16 IO
23 AM4 IO GND G A15 IO
24 A07 IO
IRQ7
❶
IO A14 IO
25 A06 IO
IRQ6
❶
IO A13 IO
26 A05 IO
IRQ5
❶
IO A12 IO
27 A04 IO
IRQ4
❶
IO A11 IO
28 A03 IO
IRQ3
❶
IO A10 IO
29 A02 IO
IRQ2
❶
IO A09 IO
30 A01 IO
IRQ1
❶
IO A08 IO
31 -12V P +5VSTDBY +12V P
32 +5V P +5V P +5V P
❶
indicates a low true signal.
❷
How the signal is used: I = input; O = output; IO = input/output; P = power; G = ground;
blank = unused and unconnected
❸
Only if the PLC-5/VME processor is configured as the slot-1 system controller . Otherwise logically
unconnected.
❹
BG0OUT and BG2OUT are driven directly by the corresponding BGxIN*’ s. This is done so that
you need not worry about the VMEbus backplane jumpers for the leftmost slot occupied by the
PLC-5/VME processor . Y ou should not install the five bus-grant and IACK daisy-chain jumpers in
the leftmost slot.
VME Signal Usage