NXP SC18IS600 SPI slave to I2C master/GPIO bridge demoboard

The SC18IS600 demoboard demonstrates our SPI slave-to-I2C master/GPIO bridges. These bridges are ideal for high-speed serial data communication between an SPI host and multiple I2C devices. The demoboard connects to a host processor via an SPI-bus interface and connects to an I2C slave device via header pins. The demoboard contains on-board LEDs, which can be controlled by the bridge's programmable GPIO. In addition, the demoboard allows the SPI host to operate an on-board I2C LED dimmer and an on-board I2C EEPROM via the SPI bus interface.

The SC18IS600 bridge IC features SPI speeds up to 1.2Mbps using an internal oscillator whereas our SC18IS601 bridge IC features SPI speeds up to 3Mbps using an external oscillator. Both bridges feature I2C speeds up to 400KHz. The SC18IS600 demoboard includes our SC18IS600 bridge which can be replaced with our SC18IS601 bridge IC and used with an external oscillator by advanced users.

The demoboard also features the NXP PCA9533 I2C 4-bit LED dimmer and the NXP PCF85103C-2 I2C EEPROM.

The demoboard features the SC18IS600 bridge. The demoboard also contains an I2C LED dimmer, on-board I2C EEPROM, and LEDs which can be controlled by the bridge's GPIO. Headers are provided for connecting to the demoboard. Three push buttons are provided to control the demoboard, generating input signals. The SC18IS600 bridge on the demoboard may be optionally desoldered and replaced with a SC18IS601 bridge and external oscillator. When using an SC18IS601 bridge, JP3 is set accordingly. Other jumper switches are for internal use and testing only.

In order to connect to the demoboard, an SPI master is required. NXP Semiconductors provides sample code routines which run on our LPC900 family of microcontrollers. Other microcontrollers or embedded processors with an SPI master interface can be used to communicate with the SC18IS600 bridge on the demoboard. The routines for the LPC900 MCU can be ported as necessary. The routines include SPI host initialization, SPI read and write routines, bridge configuration, and I2C slave device commands. The sample code is downloadable from our Standard ICs website below.

An SC18IS600 Test Program is available for operating the demoboard. The test program is used in conjunction with hardware and software available from The Boardshop. The Boardshop's Win-I2CUSBDLL adapter provides an SPI master interface via a PC's USB port. After installing the Win-I2CUSB software, the NXP Test Program can be loaded. Using buttons in the Test Program GUI, you can easily send SPI commands to control I2C slave devices.

The SC18IS600 demoboard gets its power from the SPI host. The SPI host interfaces with the demoboard via the SPI headers. The SPI host can be a microcontroller or an embedded processor with an SPI-bus port. The SPI host can communicate with multiple on-board I2C slave devices (I2C LED dimmer and I2C EEPROM) by sending SPI commands to the SC18IS600 bridge.

There are also various headers available on the demoboard. I2C headers can be used to connect an external I2C slave device. Peripherals such as LEDs can be connected to the I/O headers that interface with the programmable GPIO of SC18IS600.

The demoboard contains three switches. The first is a reset for the SC18IS600 bridge. After the bridge is reset, the device will be initialized with the default values. The second switch is connected to one of the programmable GPIO that can be programmed as an input. The third switch is used to wake up the device when the device is in the power-down mode which reduces the power consumption significantly.

	SC18IS600		SPI slave bridge to I2C master with GPIO with internal clock
	SC18IS601		SPI slave bridge to I2C master with GPIO with external clock
	Datasheet (Jul 28, 2008) SC18IS601IPW TSSOP-16 Production SOT403-1 Pb-Free MSL=1 Family Functions Literature Price More...
	PCA9533		4-Bit I2C LED Dimmer
	PCF85103C-2		256 x 8-Bit CMOS EEPROM with I2C Bus Interface

• OM6271 SC18IS600 SPI-to-I²C/GPIO Bridge Demoboard Schematics (Dec 5, 2005)
• Sample Code for SC18IS600/SC18IS601 SPI on LPC900 (Sep 26, 2006)

• SC18IS600 Test Program

Part Number OM6271: NXP SC18IS600 SPI Slave-to-I2C Master with GPIO Bridge Demoboard (Internal Clock)

The demoboard can be purchased from authorized distributors:

• Order Online at Avnet
• Order Online at Digi-Key
• Order Online at Future

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• Contact Us with Any Questions

	Your complete choice for I2C-bus peripherals Our invention, your solution to everyday design challenges © December 2007; English; Ordering code: 9397 750 15669
	Demonstration and Evaluation Boards Interface Products © August 2007; English; Ordering code: Not Orderable
	Connect I2C/SPI slave or UART to I2C/SPI master or GPIO NXP I2C/SPI master bridges SC18IS600/601, SC18IS602/603, and SC18IM700 © November 2006; English; Ordering code: 9397 750 15763
	Low-power bridges for SPI slave or UART to I2C master or GPIO NXP I2C master bridges SC18IS600/601 and SC18IM700 © September 2006; English; Ordering code: 9397 750 15674

• SPI Slave to I2C Master/GPIO Bridges
• I2C LED Controllers
• I2C Serial EEPROMs

• LPC900 MCUs

• The Boardshop Website
• The Boardshop Win-I2CUSBDLL Hardware Adapter