Ram500 Programming Issues; Serial Presence Detect (Spd) Data - Emerson MVME51005E Installation And Use Manual

5 RAM500 Memory Expansion Module
Table 5-4. RAM500 Top Side Connector (J1)Pin Assignments (continued)
127
129
131
133
135
137
139
*Common GND pins mate to GIGA assemblies with ground plates.

RAM500 Programming Issues

The RAM500 contains no user programmable registers, other than the Serial Presence Detect
(SPD) Data.

Serial Presence Detect (SPD) Data

This register is partially described for the RAM500 within the MVME5100 Single Board
Computer Programmer's Reference Guide. The register is accessed through the I
of the Hawk ASIC on the host board (MVME5100). The RAM500 SPD is software addressable
by a unique address as follows: The first RAM500 attached to the host board has has an SPD
address of $AA. The second RAM500 attached to the top of the first RAM500 has an SPD
address of $AC.
52
MVME51005E Single Board Computer Installation and Use (6806800A38B)
SDA
A1_SPD MEZZ2_L
GND
GND SDRAMCLK3
+3.3V
SDRAMCLK4
GND* GND*
128
130
132
134
136
138
140
2
C interface