INDUSTRIAL I/O PACK SERIES AVME9675A
VMEx64 bus 6U CARRIER BOARD
Acromag, Inc. Tel: 248-295-0310
- 21 - http://www.acromag.com
- 21 -
https://www.acromag.com
Note: The letter in front of the number identifies the IP Module
Slot. The number identifies the I/O pin number of that IP Module.
Example: D1
D = IP Module in Slot “D”
1 = I/O Pin number “1”
(This pin on the IP Module connects to P0, Pin 1, Row A.)
(NP) = No Pin for PO connector (Row F is for upper ground shield).
•
The P0 connector will not be present on AVME9675A-2 models.
2.12 POWER UP TIMING AND LOADING
The AVME9675A board uses a Field Programmable Gate-Array (FPGA) to
handle the bus interface and control logic timing. Upon power-up, the FPGA
automatically clocks in configuration vectors from a local PROM to initialize
the logic circuitry for normal operation. This time is measured as the first
145mS (typical) after the +5 Volt supply rises to +2.5 Volts at power-up. The
VME64x bus specification requires that the bus master drive the system
reset for the first 200mS after power-up, thus inhibiting any data transfers
from taking place.
IP control registers are also reset following a power-up sequence, disabling
interrupts, etc. (see Section 3 for details).
2.13 DATA TRANSFER TIMING
VME64x bus data transfer time is measured from the falling edge of DSx* to
the falling edge of DTACK* during a normal data transfer cycle. Typical
transfer times are given in the following table.
Register
Data Transfer Time
All Carrier Registers
500 nS, Typical.
IP Registers
500 nS, Typical, One Wait
States*
* See IP module specifications for information on wait states. IP module
register access time will increase by the number of wait states multiplied by