IBM 3301690 user manual Internal Peripheral Connectors, FDD Connector

3301690 CPU Card

		status LEDs
ATXCTL1	ATX connector	3-pin header connects a power source from a
		backplane with an ATX Connector.
CPU_FAN1	CPU Fan Power	4-pin header CPU fan power cable connector

3.2Internal Peripheral Connectors

Internal peripheral connectors are found on the CPU card and are only accessible when the CPU board is outside of the chassis. This section has complete descriptions of all the internal, peripheral connectors on the 3301690 CPU board.

3.2.1 FDD Connector

CN Label:	FDD1
CN Type:	2x17 pin header
CN Location:	See Figure 3-2
CN Pinouts:	See Table 3-1

The 3301690 is shipped with a 34-pin daisy-chain drive connector cable. This cable can be connected to the FDD connector.

PIN

1

3

5

7

9

11

13

15

17

19

DESCRIPTION	PIN	DESCRIPTION
GND	2	REDUCE WRITE
GND	4	N/C
N/C	6	N/C
GND	8	INDEX#
GND	10	MOTOR ENABLE A#
GND	12	DRIVE SELECT B#
GND	14	DRIVE SELECT A#
GND	16	MOTOR ENABLE B#
GND	18	DIRECTION#
GND	20	STEP#

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