Ampro Corporation Littleboard 550 manual CompactFlash Adapter J23, PDCE1, Vcc

Chapter 3 Hardware

CompactFlash Adapter (J23)

The board contains a Type II PC card socket, which allows for the insertion of a CompactFlash Card. The CompactFlash (CF) Card acts as a standard IDE Drive and is connected to the primary IDE bus. If a CompactFlash card is installed, only one additional IDE drive may be added to the primary bus.

Jumpers are used to select the Master/Slave mode and the voltage selection (+5V or +3.3V). Refer to Table 2-4, Jumper Settings for more information.

Table 3-11. CompactFlash Interface Pin/Signal Descriptions (J23)

Pin #	Signal	Description
1	GND	Ground
2	PDD3	Disk Data 3 – These signals (D0-D15) carry the Data, Commands, and Status
		between the host and the controller. D0 is the LSB of the even Byte of the
		Word. D8 is the LSB of the Odd Byte of the Word. All Task File operations
		occur in byte mode on the low order bus D0-D7, while all data transfers are
		16 bit using D0-D15 to provide the disk data signals.
3	PDD4	Disk Data 4 – Refer to PDD3 on pin-2 for more information.
4	PDD5	Disk Data 5 – Refer to PDD3 on pin-2 for more information.
5	PDD6	Disk Data 6 – Refer to PDD3 on pin-2 for more information.
6	PDD7	Disk Data 7 – Refer to PDD3 on pin-2 for more information.
7	PDCE1*	Primary Chip Select 1 – This signal, along with CE2*, selects the card and
		indicates when a byte or word operation is being performed. This signal
		accesses the even byte or odd byte of the word depending on A0 and CE2*.
8, 9, 10,	GND	Ground
11, 12
13	VCC	CF power – This voltage is determined by setting of JP3, CF Voltage Select
		(pins 1-2 = +5 volts ±5% Default, or pins 2-3 = +3.3 volts ±5%)
14, 15,	GND	Ground
16, 17
18	PDA2	Primary Disk Address 2 – One of three signals (0 – 2) used to select one of
		eight registers in the Task File. The host grounds all remaining address lines.
19	PDA1	Primary Disk Address 1 – Refer to A2 on pin-18 for more information.
20	PDA0	Primary Disk Address 0 – Refer to A2 on pin-18 for more information.
21	PDD0	Primary Disk Data 0 – Refer to PDD3 on pin-2 for more information.
22	PDD1	Primary Disk Data 1 – Refer to PDD3 on pin-2 for more information.
23	PDD2	Primary Disk Data 2 – Refer to PDD3 on pin-2 for more information.
24	NC	Not connected (IOCS16*)
25	GND	Ground
26	NC	Not connected
27	PDD11	Disk Data 11 – Refer to PDD3 on pin-2 for more information.
28	PDD12	Disk Data 12 – Refer to PDD3 on pin-2 for more information.
29	PDD13	Disk Data 13 – Refer to PDD3 on pin-2 for more information.
30	PDD14	Disk Data 14 – Refer to PDD3 on pin-2 for more information.

LittleBoard 550 Reference Manual 39