Digital bus interface – Pico Communications E-14 User Manual
Page 17
E‐14 Hardware Reference Manual
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Pico Computing, Inc.
17
Digital Bus Interface
When the Pico E‐14 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. All signals have user selectable pull‐
up, pull‐down, keeper or HI‐Z termination. Drive strength is also user selectable between 2 and 24mA.
All pins can be configured for input, output and bi‐directional mode.
With proper termination, speeds of over 200 MHz are possible. The external digital bus is set to
transmit and receive at 3.3V only.
Electrical Specifications (DC)
Minimum
Nominal
Maximum
Positive Supply Input Voltage (Vcc)
3.15V
3.3V
5.5V
Low Level Input Voltage
0V
0V
0.7V
High Level Input Voltage
2V
3.0V
3.3V
Drive Strength
2mA
24mA