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Pico E-15 Hardware Reference
www.picocomputing.com
Pico Computing
(206) 283-2178
150 Nickerson Street. Suite 311
Seattle, WA 98109
24
CardBus / Digital Bus Interface
The Pico E-15 can run as a standalone product or be connected to a host using the CardBus
connector. By default, the Pico E-15 ships with firmware that is ready for use as a CardBus
device.
The CardBus interface is a subset of PCI. The data path is 32 bits wide and is synchronous.
The wiring of the CardBus interface supports both completion and mastering of the bus.
When the Pico E-15 is not connected to a CardBus host, the digital bus can be reconfigured to
connect with a wide variety of high speed digital busses and peripherals. With proper external
termination, speeds of over 100 MHz are possible. The external digital bus can only interface
with 3.3V logic.
Those who are interested in alternate interfaces should contact Pico Computing. The CardBus
interface source code and support is available.
Electrical Specifications (DC) Minimum Nominal Maximum
Positive Supply Input Voltage (Vcc) 3.25V 3.3V 3.35V
Low Level Input Voltage -0.2V 0V 0.7V
High Level Input Voltage 2.0V 3.3V 3.35V
Recommended Drive Strength 8mA
Input Impedance HI-Z
Internal Bus Voltage 3.3V
PCMCIA Interface Resources:
PCMCIA Website www.pcmcia.org
PCI SIG Website www.pci.org