These have a metric 2mm spacing (not 0.1 inch).
On each, pins 1 and 2 are Vcc, pins 3,4 and 12 are Ground, and pin 10 is a no-connect.
So we get 14 pins for I/O on each, i.e. 42 IO pins, which really ain't shabby.
I worked up the following list from the schematic. Then got the signal names from the pin list.
These signal names are a dark mystery to me at this point.
DATA1-5 A20 L2N_T0_AD8N DATA1-6 H16 L13P_T2_MRCC DATA1-7 B19 L2P_T0_AD8P DATA1-8 B20 L1N_T0_AD0N DATA1-9 C20 L1P_T0_AD0P DATA1-11 H17 L13N_T2_MRCC DATA1-13 D20 L4N_T0 DATA1-14 D18 L3N_T0_DQS_AD1N DATA1-15 H18 L14N_T2_AD4N_SRCC DATA1-16 D19 L4P_T0 DATA1-17 F20 L15N_T2_DQS_AD12N DATA1-18 E19 L5N_T0_AD9N DATA1-19 F19 L15P_T2_DQS_AD12P DATA1-20 K17 L12P_T1_MRCC DATA2-5 G20 L18N_T2_AD13N DATA2-6 J18 L14P_T2_AD4P_SRCC DATA2-7 G19 L18P_T2_AD13P DATA2-8 H20 L17N_T2_AD5N DATA2-9 J19 L10N_T1_AD11N DATA2-11 K18 L12N_T1_MRCC DATA2-13 K19 L10P_T1_AD11P DATA2-14 J20 L17P_T2_AD5P DATA2-15 L16 L11P_T1_SRCC DATA2-16 L19 L9P_T1_DQS_AD3P DATA2-17 M18 L8N_T1_AD10N DATA2-18 L20 L9N_T1_DQS_AD3N DATA2-19 M20 L7N_T1_AD2N DATA2-20 L17 L11N_T1_SRCC DATA3-5 M19 L7P_T1_AD2P DATA3-6 N20 L14P_T2_SRCC DATA3-7 P18 L23N_T3 DATA3-8 M17 L8P_T1_AD10P DATA3-9 N17 L23P_T3 DATA3-11 P20 L14N_T2_SRCC DATA3-13 R18 L20N_T3 DATA3-14 R19 IO_0_34 DATA3-15 P19 L13N_T2_MRC DATA3-16 T20 L15P_T2_DQS DATA3-17 U20 L15N_T2_DQS DATA3-18 T19 IO_25_34 DATA3-19 V20 L16P_T2 DATA3-20 U19 L12N_T1_MRCC
And for good measure, we have two LED's and two Buttons
Red LED W14 L12N_T1_MRCC Green LED W13 L4N_T0 S2 button A17 MIO20 S3 button A14 MIO32
Tom's Computer Info / [email protected]