Device
and operation
CPC307
C P C 3 0 7 U s e r M a n u a l
41
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4.3.4 MicroSD
Two microSD cards can be connected to the CPC307-04 version. Connection is made to the XS3
and XS4, which are connected to the SD interface. These connectors are for microSD and
microSDHC memory cards only.
Make sure that no IDE devices are connected to the module, and the "SD Card" mode is selected
in the BIOS Setup menu for the Primary IDE port.
Attention!
Simultaneous connection of IDE devices and microSD memory cards is NOT
allowed.
The interface is routed to the XS3 (Channel 0) and XS4 (Channel 1) connectors.
The pin assignment of the XS3 and XS4 connectors is given in Table 4.11.
The module is equipped with Hirose DM3B-DSF-PEJ connectors.
Table 4.11. Pin assignment of XS3 and XS4 for connection of microSD cards
Pin
Signal
Pin
Signal
1
DAT2
6
GND
2
CD/DAT3
7
DAT0
3
CMD
8
DAT1
4
VCC (+3.3V)
9
CDSwA
5
CLK
10
CDSwB (GND)
Figure 4.10. Numbering pins of the microSD memory card
4.3.5 ATA Flash disk controller
The module has a NAND Flash memory controller chip (ATA Flash disk controller), which is
connected to the Primary IDE interface. A 1 GB (for versions older than 4.x) or 2 GB (for 4.x
versions) Flash memory chip, using NAND technology, is connected to this controller. This
controller is detected by the system as an IDE drive and can be used as a boot drive.
With a jumper placed on pins 1-2 of the XP24 connector, the controller is in master mode on the
IDE bus. If the jumper is removed, it is in
“slave” mode.
The controller can be forcibly disabled by setting the jumpers 2-3 contacts of the XP24 connector
(paragraph 4.3.20 Configuration jumpers) - the above information is only relevant for versions 4.x,
limitations specified in Section 8 apply to versions 3.x.
Note
The maximum reading speed can be about 13.5 MB/s, and the maximum writing
speed is 7.5 MB/s.