Compactflash Adapter (J23); Table 3-6. Compactflash Interface Pin/Signal Descriptions (J23) - Ampro ReadyBoar 800 Reference Manual

Chapter 3

CompactFlash Adapter (J23)

The board contains a CompactFlash socket, which allows for the insertion of a CompactFlash Card. The
CompactFlash Card acts as a standard IDE Drive and is connected to the Secondary IDE bus. If a
CompactFlash card is installed, it is the only device using the secondary IDE bus. A Jumper is used to
select the Master/Slave mode. Refer to Table 2-4, Jumper Settings for more information.
CAUTION To prevent system hangs when using older CompactFlash cards,
ensure your CompactFlash is compatible with UDMA 100 IDE
hard disk drives. Consult your CompactFlash card vendor for
UDMA 100 compatibility.

Table 3-6. CompactFlash Interface Pin/Signal Descriptions (J23)

Pin # Signal
1 GND
2 SDD3
3 SDD4
4 SDD5
5 SDD6
6 SDD7
7 SDCS1*
8, 10 NC
9 GND
11, 12 NC
13 VCC
14, 15 NC
16, 17 NC
18 SDA2
19 SDA1
20 SDA0
21 SDD0
22 SDD1
23 SDD2
24 NC
25 CFD2
32
Description
Digital Ground
Secondary 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.
Secondary Disk Data 4 – Refer to SDD3 on pin-2 for more information.
Secondary Disk Data 5 – Refer to SDD3 on pin-2 for more information.
Secondary Disk Data 6 – Refer to SDD3 on pin-2 for more information.
Secondary Disk Data 7 – Refer to SDD3 on pin-2 for more information.
Secondary Chip Select 1 – This signal, along with CE2*, selects the card and
indicates to the card 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*.
Not connected
Digital Ground
Not connected
+5 volts +/-5%
Not connected
Not connected
Secondary Address select 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.
Secondary Address select 1 – Refer to A2 on pin-18 for more information.
Secondary Address select 0 – Refer to A2 on pin-18 for more information.
Secondary Disk Data 0 – Refer to SDD3 on pin-2 for more information.
Secondary Disk Data 1 – Refer to SDD3 on pin-2 for more information.
Secondary Disk Data 2 – Refer to SDD3 on pin-2 for more information.
Not connected (IOCS16*)
Connected through 4.7k ohm resister to ground
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ReadyBoard 800