Dual Port Ram Access; Interface Requirementso; Bus Interface; Dc Bus Characteristicso - Advanced Micro Computers Am96/4116A User Manual

DUAL PORT RAM ACCESS
The on-board RAM can be accessed either by the CPU or an off-board
source through the Multibus. Jumpering pins 167 and 168 perm'its normal
dual-port access. Jumpering pins 166 and 167, permits shorter RAM
access times through the Multibus. The first bus access is 1350 to
3275 subsequent accesses, providing the BUSY* line is kept active, are
737 to 1087 ns.
NOTE
CPU operation is suspended while BUSY* is true.
INTERFACE REQUIREMENTS
The Am96/4116A MonoBoard Computer connects into a system bus through
PI, to an auxiliary bus through P2, to a parallel peripheral interface
through P3, and'to two serial peripheral interfaces through P4 and P5.
Table 2-11 lists the mating connectors.
TABLE 2-11. Am96/4116A CONNECTORS
CONNECTOR NUMBER
NUMBER OF PINS
PI 86
P2 60
P3 50
P4 26
P5 26
CONNECTOR EQUIVALENT
CHARACTERISTICS TYPE
0.156 inch spacing CDC VPB01E43A-OOA1
0.100 inch s paci ng
0.100 inch spacing 3M #3415-0001
0.100 inch spacing 3M #3462-0001
0.100 inch spacing 3M #3462-0001
BUS INTERFACE
Connector PI provides the bus interface for the Am96/4116A.
PI is a double-sided edge connector. Table 2-12
designations.
DC BUS CHARACTERISTICS
Connector
lists pin
Table 2-13 lists the DC characteristics of the Multibus. For more
information on the Multibus, refer to the Intel Application Note,
AP-28A, Multibus Interfacing.
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