IDE to CompactFlash (CF) adapter schematic pinout

40 pin IDC female connector layout
40 pin IDC female connector at the cable


50 pin CompactFlash female connector layout
50 pin CompactFlash female connector

IDE-Signal IDE-Pin Connect to CF-Signal CF-Pin   CF-Pin CF-Signal Connect to IDE-Pin IDE-Signal
GND GND 1   26 -CD1 nc
D03 11 D03 2   27 D11 10 D11
D04 9 D04 3   28 D12 12 D12
D05 7 D05 4   29 D13 14 D13
D06 5 D06 5   30 D14 16 D14
D07 3 D07 6   31 D15 18 D15
-CS0 37 -CE1 7   32 -CE2 38 -CS1
GND A10 8   33 -VS1 GND
GND -OE 9   34 -IORD 25 -IOR
GND A09 10   35 -IOWR 23 -IOW
GND A08 11   36 -WE nc
GND A07 12   37 -RDY/ -BSY/ -IREQ 31 INTRQ/IRQ14
Vcc Vcc 13   38 Vcc Vcc
GND A06 14   39 -CSEL -Master/ Slave
GND A05 15   40 -VS2 nc
GND A04 16   41 -Reset 1 -Reset
GND A03 17   42 -WAIT 27 IOCHRDY
A02 36 A02 18   43 -INPACK 21 -DMAREQ
A01 33 A01 19   44 -REG 29 -DMAACK
A00 35 A00 20   45 BVD2 LED * 39 -Active
D00 17 D00 21   46 BVD1 34 reserved
D01 15 D01 22   47 D08 4 D08
D02 13 D02 23   48 D09 6 D09
-IOCS16 32 WP/-IOCS16 24   49 D10 8 D10
nc -CD2 25   50 GND GND

* LED via 1KOhm to Vcc

Tip how to know which keys are 1-25 and 26-50:
It is known that CF keys 1, 25, 26, 50 is grounded (still mirror riddle)
and only one more grounded key 33 is answer. If you look picture how
Female connector looks, then key 33 is 8th hole from left in upper-row.
Now just get a chain-link using your resistance-tester for any key 1,
25, 26 or 50 to this 8th hole by turning CF card upside-down. When you
got link, then you know where is key 33, so left is 26, right is 50 and
down-left is 1 and down-right is 25. Note: use picture from pinouts.ru
for pin assigment.

None found.