Computer buses and slots connectors
32-bit bus defined by PCMCIA.

CardBus, the 32-bit high performance bus mastering architecture for PC Cards, was standardized by the PCMCIA in May 1996. This bus is targeted to mobile computers. PCI-like 32-bit interface operates at a power-saving 3.3 volts, and cards can include standardized power-management mechanisms. The CardBus interface allows an I/O adapter or a memory module to be added to or removed without disrupting the systems operation. It adds high bandwidth PCI-based capabilities to the PC Card technology.

CardBus PC Cards are attached to their host system through a sturdy 68-pin connector, which is common to all PC Cards. (CardBus cards employ a shielding shroud around this connector, to enhance their signal integrity).

CardBus cards adopt the well-established PC Card form-factors. There are different types of CardBus cards (sizes are TxLxW):

  • Type I: 3.3mm x 85.6mm x 54.0mm
  • Type II: 5.0mm x 85.6mm x 54.0mm
  • Type III: 10.5mm x 85.6mm x 54.0mm

CardBus provides a 32-bit multiplexed address/data path, which operates at PCI local-bus speeds of up to 33 MHz, yielding a peak bandwidth of 132MB/sec. CardBus accomplishes this by adopting the synchronous burst-transfer orientation of PCI, as well as a bus protocol, which is essentially identical to that of PCI.

Pin Name Description
1 GND Ground
2 CAD0 Address/Data 0
3 CAD1 Address/Data 1
4 CAD3 Address/Data 3
5 CAD5 Address/Data 5
6 CAD7 Address/Data 7
7 CCBE0# Command/Byte Enable 0
8 CAD9 Address/Data 9
9 CAD11 Address/Data 11
10 CAD12 Address/Data 12
11 CAD14 Address/Data 14
12 CCBE1# Command/Byte Enable 1
13 CPAR Parity
14 CPERR# Parity error
15 CGNT# Grant
16 CINT# Interrupt
17 Vcc Vcc
18 Vpp1 Vpp1
19 CCLK CCLK
20 CIRDY# Initiator Ready
21 CCBE2# Command/Byte Enable 2
22 CAD18 Address/Data 18
23 CAD20 Address/Data 20
24 CAD21 Address/Data 21
25 CAD22 Address/Data 22
26 CAD23 Address/Data 23
27 CAD24 Address/Data 24
28 CAD25 Address/Data 25
29 CAD26 Address/Data 26
30 CAD27 Address/Data 27
31 CAD29 Address/Data 29
32 RSRVD Reserved
33 CCLKRUN# CCLKRUN#
34 GND Ground
35 GND Ground
36 CCD1# Card Detect 1
37 CAD2 Address/Data 2
38 CAD4 Address/Data 4
39 CAD6 Address/Data 6
40 RSRVD Reserved
41 CAD8 Address/Data 8
42 CAD10 Address/Data 10
43 CVS1  
44 CAD13 Address/Data 13
45 CAD15 Address/Data 15
46 CAD16 Address/Data 16
47 RSRVD Reserved
48 CBLOCK# Block ???
49 CSTOP# Stop transfer cycle
50 CDEVSEL# Device Select
51 Vcc Vcc
52 Vpp2 Vpp2
53 CTRDY# Target Ready
54 CFRAME# Address or Data phase
55 CAD17 Address/Data 17
56 CAD19 CAD19
57 CVS2  
58 CRST# Reset
59 CSERR# System Error
60 CREQ# Request ???
61 CCBE3# Command/Byte Enable 3
62 CAUDIO Audio ???
63 CSTSCHG  
64 CAD28 Address/Data 28
65 CAD30 Address/Data 30
66 CAD31 Address/Data 31
67 CCD2# Card Detect 2
68 GND Ground

Another representation (looking into card)

           
GND   1 35   GND
CAD0 <-> 2 36 --> !CCD1
CAD1 <-> 3 37 <-> CAD2
CAD3 <-> 4 38 <-> CAD4
CAD5 <-> 5 39 <-> CAD6
CAD7 <-> 6 40 - RSRVD
!CCBE0 --> 7 41 <-> CAD8
CAD9 <-> 8 42 <-> CAD10
CAD11 <-> 9 43 - CVS1
CAD12 <-> 10 44 <-> CAD13
CAD14 <-> 11 45 <-> CAD15
!CCBE1 --> 12 46 <-> CAD16
CPAR --> 13 47 --- RSRVD
!CPERR --> 14 48 - !CBLOCK
!CGNT --> 15 49 - !CSTOP
!CINT --> 16 50 - !CDEVSEL
Vcc --> 17 51 <-- Vcc
Vpp1 --> 18 52 <-- Vpp2
CCLK --> 19 53 - !CTRDY
!CIRDY - 20 54 - !CFRAME
!CCBE2 --> 21 55 <-> CAD17
CAD18 <-> 22 56 <-> CAD19
CAD20 <-> 23 57 - CVS2
CAD21 <-> 24 58 <-- !CRST
CAD22 <-> 25 59 - !CSERR
CAD23 <-> 26 60 - !CREQ
CAD24 <-> 27 61 <-- !CCBE3
CAD25 <-> 28 62 --> CAUDIO
CAD26 <-> 29 63 - CSTSCHG
CAD27 <-> 30 64 <-> CAD28
CAD29 <-> 31 65 <-> CAD30
RSRVD --- 32 66 <-> CAD31
!CCLKRUN <-- 33 67 --> !CCD2
GND --- 34 68 --- GND
68 pin male connector layout
68 pin male connector
at the peripherals
68 pin female connector layout
68 pin female connector
According to 2 reports in our database (1 positive and 1 negative) this pinout may be incorrect.

Is this pinout
CardBus visual pinout:
CardBus diagram
click to enlarge
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