Datasheet

Application Information
13−7
SLLS535E − April 2008 TUSB6250
Table 13−3. CompactFlashE Card System Performance (Reference Only)
PARAMETER CONDITION VALUE
Sleep to write 2.5 ms maximum
Start-up times
Sleep to read 2 ms maximum
Start-up times
Reset to ready 50 ms typical, 400 ms maximum
Active to sleep delay Programmable
Data transfer rate To/from host 16−20-MBps burst
Controller overhead Command to DRQ 1.25 ms maximum
13.5.1.2 Capacity, Connector, Header, and Ejector
• There are two types of CompactFlash storage cards, which differ in card thickness and capacity. The type I
card has a thickness of 3,3 mm ±0,1 mm. The type II card has a thickness of 5 mm and has a larger capacity
of up to 300M bytes, so far.
• Regardless of which type of CompactFlash storage cards are used, they all use the standard 50-pin
electrically compatible connector standard, however they differ in mechanical dimension.
• The CompactFlash storage card may be installed in any platform with:
• A 50-position surface mount interface header (3M P/N N7E50-7516VY-20).
• An ejector (3M P/N D7E50-7316-02) or equivalent.
13.5.2 Pin Assignment and Mapping
Table 13−4 shows the pin assignment and mapping for the TUSB6250 based CompactFlash storage card
reader implemented in the true-IDE mode.
It should be noted that all the information described here, including the recommended pin assignment and
mapping, along with the power-up sequence, is only meant for the single CompactFlash storage card reader
implementation. This implies that the CompactFlash storage card reader is the only device on the IDE bus.
If implementing the CompactFlash storage card reader in a dual-drive enviroment is desired, the
CompactFlash storage card reader shares the same IDE bus with another device like the hard-disk drive,
modification to the described recommendation is needed. Developers with such an interest can contact Texas
Instruments for further information.