
VMOD-2/VMOD-2D
12/15/97
Product Overview
Page 1 - 10Man. ID 03139, Rev. Index 0200
1.8 Functional Block Diagram of the VMOD-2
Figure 1-3: Functional Block Diagram
Data Latch
Data
Driver
Piggyback Select
Ad dress
Decoding and
I/O Control
Logic
Externa l Rese t
Input Logic &
Disa ble Jumper
Local Reset
Interrupt Control
Logic and
IRQ* Driver
VMEbus
Local/PB
Control
Logic
Piggyback "A"
(Upper Location)
ID 0...15
PB I.D . data
IA 1...11
RESET
CLK
IA S
ID S0 / ID S1
UDTACK0
CS0
IN T 0
INTA0
Use r
I/O
According
To
Piggyback
Type
Fitte d
Optional Extra
Must be ordered
and fitted
Piggyback "B"
(Lower Location)
ID 0...15
PB I.D . data
IA 1...11
RESET
CLK
IA S
ID S0 / ID S1
UDTACK1
CS1
IN T 1
INTA1
Use r
I/O
According
To
Piggyback
Type
Fitte d
Optional Extra
Must be ordered
and fitted
Data
Add ress
Control
Including...
SYSCLK*
SYSRESET*
WRITE*
AS*
DS 0*
DS 1*
IRQ1*...7*
IACKIN*
IA CK OUT*
AM0...5
LWORD*
IACK*
96-way VMEbus Interface Connector
50-way External Interface(s)
Pins 27...50 for Upper Piggyback Pins 01...24 for Low er Piggyback
Pi n s
25 & 26
Data
Ad dress
Control
A24/A16:D16/D8
Slave VMEbus
Interface
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