Motorola CPCI-6020 manual Memory Mezzanine Connectors, 13 J8 and J27 Memory Mezzanine Connector

Memory Mezzanine ConnectorsControls, LEDs, and Connectors

Table 3-12 J5 Signal Descriptions (continued)

Signal	Description
TR0_L	Track 0 indicator
TXDn	Serial transmit data
UDATAn-	Low signal of differential data for USB channel
UDATAn+	High signal of differential data for USB channel
Universal Serial Bus (USB 0 & 1), USB levels
UVCCn	Fused power for USB channel.
WDATA_L	Write data
WGATE_L	Enables the head write circuitry
WPROT_L	Indicates the disk is write protected.

3.4.5Memory Mezzanine Connectors

Table 3-13 on page 67 shows the pin assignments for the two 140-pin AMP 0.6 mm Free Height mating connectors, which provide a memory expansion capability and include common ground contacts that mate.

Table 3-13 J8 and J27 Memory Mezzanine Connector

	Pin	Pin Name	Pin Name	Pin	Pin	Pin Name	Pin Name	Pin
	1	GND *	GND *	2	73	DQ56	DQ57	74
	3	DQ00	DQ01	4	75	DQ58	DQ59	76
	5	DQ02	DQ03	6	77	DQ60	DQ61	78
	7	DQ04	DQ05	8	79	GND *	GND *	80
	9	DQ06	DQ07	10	81	DQ62	DQ63	82
	11	+3.3 V	+3.3 V	12	83	CKD00	CKD01	84
	13	DQ08	DQ09	14	85	CKD02	CKD03	86
	15	DQ10	DQ11	16	87	CKD04	CKD05	88
	17	DQ12	DQ13	18	89	+3.3 V	+3.3 V	90
	19	DQ14	DQ15	20	91	CKD06	CKD07	92
	21	GND *	GND *	22	93	BA1	BA0	94
	23	DQ16	DQ17	24	95	A12	A11	96
	25	DQ18	DQ19	26	97	A10	A09	98
	27	DQ20	DQ21	28	99	GND *	GND *	100
	29	DQ22	DQ23	30	101	A08	A07	102
	31	+3.3 V	+3.3 V	32	103	A06	A05	104
	33	DQ24	DQ25	34	105	A04	A03	106
	35	DQ26	DQ27	36	107	A02	A01	108
	37	DQ28	DQ29	38	109	+3.3 V	+3.3 V	110
CPCI-6020 CompactPCI Single Board Computer Installation and Use (6806800A51C)								67