1. NS Training Hardware

2. NS9750 CardBus Support

3. CardBus Support
Supports 32-bit PC Cards as defined in the PC Card Standard Release 8 (specification available at
Supports maximum specified bus speed of 33Mhz
On-chip CardBus arbiter which always parks bus on NS9750
Who ever was the last owner of the bus remains that until some other module requests the bus owbership
Acts only as a CardBus Host
Provides CardBus Central Resource functions
CardBus clock can be provided by NS9750
Configured for CardBus via single hardware strapping pin (BOOT_STRAP[1])
Supports CardBus Socket Registers
Supports all CardBus interrupt sources (e.g. CINT#,CSTSCHG)

4. CardBus Limitations No support for 16-bit PC Cards (aka PCMCIA)
Socket controller functions (e.g. card interrogation) normally done in hardware by commercial CardBus controllers done in software with minimal hardware support via the CardBus Miscellaneous Support Register
Tailored towards embedded applications where CardBus card is present in socket when system is powered

5. NS9750 CardBus Configuration
PCI_CENTRAL_RSC_N (Internal pull-down) must be “0” to provide Central Resource Functions, i.e. System clock, the driving of the address lines and etc.
RTCK (Internal pull-up) must be “1” to enable internal arbiter
BOOT_STRAP[1] (Internal pull-up) must be “0” to put in CardBus mode
IDSEL must be “1” since CardBus does not support this pin.
Series resistors may be required close to NS9750 pins to limit slew-rate
The system must provide pull-up or pull-down resistors on signals:
CFRAME#,CTRDY#,CIRDY#,CDEVSEL#,CSTOP#,CPERR#, CINT#(pull-up)
CSERR#, CREQ#,CGNT#,CCLKRUN#,CCD1,CCD2,INTD# (pull-up)
CSTSCHG (pull-down)
See PCI FAQ for additional information

6. NS9750 CardBus System

7. Connection of CardBus Specific Signals to NS9750

8. Hints & Kinks
How long can the CardBus traces between the NS9750 and the CardBus connector be?
There is no maximum length specified. However, the total capacitive load presented by the system to a CardBus device (i.e. NS9750, connector, trace, and vias) must be less than 22pf.
Does the NS9750 support CardBus and PCI devices at the same time?
No, the NS9750 can be configured for either PCI or CardBus, but not both.
How many external CardBus devices does the NS9750 support?
The CardBus is designed for point-to-point connection of a host and one external CardBus device.