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5 Electrical interface
5.1 Electrical description
The CompactFlash 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 11 Low active signals have a ‘ - ’ prefix. Pin types are Input, Output or
Input/Output.
The configuration of the Card is controlled using the standard PCMCIA configuration registers starting at address
200h in the Attribute Memory space of the memory card. Table 12 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 11: Pin 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
2
3
4
5
6
7
D03
D04
D05
D06
D07
-CE1
I/O
I/O
I/O
I/O
I/O
I
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I3U
D03
D04
D05
D06
D07
-CE1
I/O
I/O
I/O
I/O
I/O
I
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I3U
D03
D04
D05
D06
D07
-CS0
I/O
I/O
I/O
I/O
I/O
I
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
I3Z
8
A10
I
I1Z
A10
I
I1Z
A10
(2)
I
I1Z
9
(1)
-OE
I
I3U
-OE
I
I3U
-ATASEL
I
I3U
10
A09
I
I1Z
A09
I
I1Z
A09 (2)
I
I1Z
11
A08
I
I1Z
A08
I
I1Z
A08
(2)
I
I1Z
A07
12
A07
I
I1Z
A07
I
I1Z
(2)
I
I1Z
13
Vcc
Power
Vcc
Power
Vcc
Power
14
A06
I
I1Z
A06
I
I1Z
A06 (2)
I
I1Z
15
A05
I
I1Z
A05
I
I1Z
A05
(2)
I
I1Z
16
17
18
19
20
21
22
23
24
25
26
A04
A03
A02
A01
A00
D00
D01
D02
WP
-CD2
-CD1
I
I
I
I
I
I/O
I/O
I/O
O
O
O
I1Z
I1Z
I1Z
I1Z
I1Z
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
OT3
Ground
Ground
A04
A03
A02
A01
A00
D00
D01
D02
-IOIS16
-CD2
-CD1
I
I
I
I
I
I/O
I/O
I/O
O
O
O
I1Z
I1Z
I1Z
I1Z
I1Z
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
OT3
Ground
Ground
A04 (2)
A03 (2)
A02
A01
A00
D00
D01
D02
-IOIS16
-CD2
-CD1
I
I
I
I
I
I/O
I/O
I/O
O
O
O
I1Z
I1Z
I1Z
I1Z
I1Z
I1Z,OZ3
I1Z,OZ3
I1Z,OZ3
ON3
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
29
D13 (1)
I/O
I1Z,OZ3
D13 (1)
I/O
I1Z,OZ3
D13 (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: 1.20
CH-9552 Bronschhofen
Switzerland
www.swissbit.com
industrial@swissbit.com
C-320_data_sheet_CF-HxBO_Rev120.doc
Page 11 of 101
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