KXUSB-910H Keterex, KXUSB-910H Datasheet - Page 6

• Manufacturer Part Number: KXUSB-910H
• Description: Interface Modules & Development Tools USB-to-SPI/I2C Embedded Sys Intrfce
• Manufacturer: Keterex

Specifications of KXUSB-910H

• Interface Type: USB, I2C, SPI
• Operating Supply Voltage: 1.65 V to 5 V
• Product: Interface Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

host PC and a target system. The USB-910H provides this connectivity by converting USB transactions
from the PC into I2C, SMBus, SPI, or “bit-banged” general-purpose I/O operations.
The USB-910H Adapter provides the following high-level capabilities:
At any given time, the USB-910H Adapter can act as any one of the four serial devices list above (an
I2C/SMBus or SPI + Master or Slave), can be used strictly for general-purpose I/O operations, or can be
both a serial device and perform “bit-banged” operations using the remaining I/O pins. The I2C Pull-up
Resistors can be enabled in any combination with the other features, even if the Adapter is not acting as
an I2C device.
All Adapter pins operate using a programmable I/O logic range
The USB-910H Adapter has the ability to level-shift the interface pins from a programmable I/O voltage to
its own internal logic levels. This level-shifting is done using a true high-impedance method – the target
system is not required to drive DC current into or out of the adapter pins. The I/O voltage at which the
SMBus standard.
The table below shows the specific capabilities of each Adapter pin (beyond those associated with the
I2C/SMBus and SPI interfaces).
6. FUNCTIONAL DESCRIPTION
The USB-910H Embedded Systems Interface is a complete solution for providing connectivity between a
with target systems running at a wide range of supply voltages. Regardless of the I/O voltage, all Adapter
pins except GP3 can tolerate voltages up to VBUS+0.3V (GP3 is limited to V
6.1. I/O Voltage and Powering the Target System
1
6
The SDA and SCL pins switch to fixed logic levels when in I2C/SMBus mode to accommodate the
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I2C/SMBus Master mode.
I2C/SMBus Slave mode.
SPI Master mode.
SPI Slave mode.
Up to 9 general-purpose I/O.
I2C/SMBus Pull-up Resistors.
Target VDD supply from 1.65V to 3.6V, or 5V @ 400mA.
SCLK
MOSI
MISO
SDA
SCL
GP1
GP2
GP3
Pin
SS
General-Purpose
Input
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Table 2. Adapter Pin Capabilities.
General-Purpose
Output
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1
Master Mode
Slave-Select
. This allows the Adapter to communicate
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IO
+0.3V).
Slave-Select
Slave Mode
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