Motorola Single Board Computer, MVME5100 manual Top Side Memory Expansion Connector J1

D

RAM500 Connectors

Table D-3. RAM500 Bottom Side Connector (P1)

Pin Assignments (Continued)

125	DQMB1	SCL	126
127			128
	SDA	A1_SPD
129			130
	A0_SPD	MEZZ1_L
131			132
	MEZZ2_L	GND
133	GND	SDRAMCLK1	134
135			136
	SDRAMCLK3	+3.3V
137			138
	SDRAMCLK4	SDRAMCLK2
139			140
	GND*	GND*

*Common GND pins mate to a GIGA assembly with a ground plate. The GIGA assembly is an enhanced electrical performance receptacle and plug from AMP that includes receptacles loaded with contacts for grounding circuits at 9 or 10 signal circuits. These ground contacts mate with grounding plates on both sides of the plug assemblies.

Top Side Memory Expansion Connector (J1)

The top side memory expansion connector is a 140-pin AMP 0.6mm Free Height receptacle. This receptacle includes common ground contacts that mate with standard AMP plug assemblies or AMP GIGA assemblies with ground plates. A single memory module will have one bank of SDRAM for a maximum of 256MB of memory. The pin assignments for this connector are as follows:

Table D-4. RAM500 Top Side Connector (J1)

Pin Assignments

1	GND*	GND*	2
3			4
	DQ00	DQ01
5			6
	DQ02	DQ03
7			8
	DQ04	DQ05
9			10
	DQ06	DQ07
11			12
	+3.3V	+3.3V

D-10 Computer Group Literature Center Web Site