Extracted from CF Spec rev 1.4

What follows are CompactFlash Pin Connections for
True IDE Mode (Optional for CF+ Cards,
  required for CompactFlash Storage Cards.)

InOutType can be somewhat confusing; I will attempt to explain
this briefly here.

IxZ -- high-impedance input
IxU -- pull-up resistor, 50K to 500K
IxD -- pull-down resistor, 50K to 500K
  where x is one of:
    1: minimum logic high input voltage (Vdd 3.3 Volts) = 2.4 Volts
    2: minimum logic high input voltage (Vdd 3.3 Volts) = 1.5 Volts
    3: Schmitt Trigger input (Vdd 3.3 Volts) 1.8V High, 1.0V low typical.

OTx -- Push-pull (Totem-pole)
OZx -- Tri-state N-P Channel
OPx -- P-Channel only (Open-source; wire-AND) sources current only
ONx -- N-Channel only (Open-drain; wire-OR) sinks current only.
  where x is one of:
    1: logic high voltage (Vdd=3.3 Volts) = 2.5V at -4mA
       logic low voltage  (Vdd=3.3 Volts) = 0.4V at 4mA
    3: logic high voltage (Vdd=3.3 Volts) = 2.5V at -8mA
       logic low voltage  (Vdd=3.3 Volts) = 0.4V at 8mA

PinNum	SigName	PinType	InOutType

1	GND	-	Ground
2	D03	I/O	I1Z,OZ3
3	D04	I/O	I1Z,OZ3
4	D05	I/O	I1Z,OZ3
5	D06	I/O	I1Z,OZ3
6	D07	I/O	I1Z,OZ3
7	-CS0	I	I3Z
8	A102	I	I1Z
9	-ATASEL	I	I3U
10	A092	I	I1Z
11	A082	I	I1Z
12	A072	I	I1Z
13	VCC	-	Power
14	A062	I	I1Z
15	A052	I	I1Z
16	A042	I	I1Z
17	A032	I	I1Z
18	A02	I	I1Z
19	A01	I	I1Z
20	A00	I	I1Z
21	D00	I/O	I1Z,OZ3
22	D01	I/O	I1Z,OZ3
23	D02	I/O	I1Z,OZ3
24	-IOCS16	O	ON3
25	-CD2	O	Ground
26	-CD1	O	Ground
27	D111	I/O	I1Z,OZ3
28	D121	I/O	I1Z,OZ3
29	D131	I/O	I1Z,OZ3
30	D141	I/O	I1Z,OZ3
31	D151	I/O	I1Z,OZ3
32	-CS11	I	I1Z
33	-VS1	O	Ground
34	-IORD	I	I3Z
35	-IOWR	I	I3Z
36	-WE3	I	I3U
37	INTRQ	O	OZ1
38	VCC	-	Power
39	-CSEL	I	I2U
40	-VS2	O	OPEN
41	-RESET	I	I2Z
42	IORDY	O	ON1
43	-INPACK	O	OZ1
44	-REG3	I	I3U
45	-DASP	I/O	I1U,ON1
46	-PDIAG	I/O	I1U,ON1
47	D081	I/O	I1Z,OZ3
48	D091	I/O	I1Z,OZ3
49	D101	I/O	I1Z,OZ3
50	GND	-	Ground