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5 Electrical interface
5.1 Electrical description
The CompactFlash TM Memory Card operates in three basic modes:
PC Card ATA using I/O Mode
PC Card ATA using Memory Mode
True IDE Mode with MWDMA and UDMA, which is compatible with most disk drives
The signal/pin assignments are listed in Table 10 Low active signals have a ‘ - ’ prefix. Pin types are Input, Output
or Input/Output.
The configuration of the Card is controlled using the standard PC card configuration registers starting at address
200h in the Attribute Memory space of the memory card. Table 11 describes the I/O signals. Inputs are signals
sourced from the host while Outputs are signals sourced from the Card. The signals are described for each of the
three operating modes.
All outputs from the Card are totem pole except the data bus signals that are bi-directional tri-state. Refer to the
section titled “Electrical Specifications” for definitions of Input and Output type.
Table 10: Pi n Assignment and Pin Type
Pin Num
PC Card Memory Mode
PC Card I/O Mode
True IDE Mode
(4)
1
Signal
Name
GND
Pin
Type
In, Out
Type
Ground
Signal
Name
GND
Pin
Type
In, Out
Type
Ground
Signal
Name
GND
Pin
Type
In, Out
Type
Ground
A10
2
3
4
5
6
7
8
D3
D4
D5
D6
D7
-CE1
A10
I/O
I/O
I/O
I/O
I/O
I
I
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I3U
I1Z
D3
D4
D5
D6
D7
-CE1
A10
I/O
I/O
I/O
I/O
I/O
I
I
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I3U
I1Z
D3
D4
D5
D6
D7
-CS0
(2)
I/O
I/O
I/O
I/O
I/O
I
I
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I3Z
I1Z
9
(1)
-OE
I
I3U
-OE
I
I3U
-ATASEL
I
I3U
10
A9
I
I1Z
A9
I
I1Z
A9
(2)
I
I1Z
11
A8
I
I1Z
A8
I
I1Z
A8
(2)
I
I1Z
12
A7
I
I1Z
A7
I
I1Z
A7
(2)
I
I1Z
13
Vcc
Power
Vcc
Power
Vcc
Power
14
A6
I
I1Z
A6
I
I1Z
A6
(2)
I
I1Z
A5
15
A5
I
I1Z
A5
I
I1Z
(2)
I
I1Z
16
A4
I
I1Z
A4
I
I1Z
A4
(2)
I
I1Z
A3
A0
A0
17
18
19
20
21
22
23
A3
A2
A1
(11)
D0
D1
D2
I
I
I
I
I/O
I/O
I/O
I1Z
I1Z
I1Z
I1Z
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
A3
A2
A1
(11)
D0
D1
D2
I
I
I
I
I/O
I/O
I/O
I1Z
I1Z
I1Z
I1Z
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
(2)
A2
A1
A0
D0
D1
D2
I
I
I
I
I/O
I/O
I/O
I1Z
I1Z
I1Z
I1Z
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
24
WP
O
OT3
-IOIS16
(10)
O
OT3
-IOIS16
O
ON3
25
26
-CD2
-CD1
O
O
Ground
Ground
-CD2
-CD1
O
O
Ground
Ground
-CD2
-CD1
O
O
Ground
Ground
27
D11
(1)
I/O
I1Z,OZ3
D11
(1)
I/O
I1Z,OZ3
D11
(1)
I/O
I1Z,OZ3
28
D12
(1)
I/O
I1Z,OZ3
D12
(1)
I/O
I1Z,OZ3
D12
(1)
I/O
I1Z,OZ3
D13
D13
D13
29
(1)
I/O
I1Z,OZ3
(1)
I/O
I1Z,OZ3
(1)
I/O
I1Z,OZ3
30
D14
(1)
I/O
I1Z,OZ3
D14
(1)
I/O
I1Z,OZ3
D14
(1)
I/O
I1Z,OZ3
Swissbit AG
Industriestrasse 4
Swissbit reserves the right to change products or specifications without notice.
Revision: 1.00
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-440_data_sheet_CF-HxBU_Rev100.doc
Page 11 of 102
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