U2C-12 is SPI host adapter using 4 SPI standard control lines: MOSI, MISO, SCLK and SS. U2C-12 controls SPI slave devices, so it is suitable for SPI master applications. This USB-SPI adapter can be utilized to build your own SPI control applications. Diolan drivers, API functions and DLL as well as source code examples are provided for free.

The SPI port supports variable frequencies from 2 kHz to 200 kHz. However, you can specify the frequency no more than the maximum frequency of the SPI slave device.

SPI Slave Mode:

In SPI slave interface the slave transmits data in MISO pin and receives data on MOSI pin. To enable the slave to transmit, the master must pull LOW the SS line. If the shift register is free, the slave writes to a transmit buffer and the buffer contents is immediately transferred to the shift register. If the shift register is busy, the adapter waits until it is released.

After each transferred byte the master sends SPI interrupt request.

U2C-12 SPI host adapter supports the following SPI transactions (See USB-SPI Interface Adapters Comparison):

reading;
writing;
full-duplex mode (simultaneous reading and writing);
half-duplex mode (the master does not receive data from slave but can transmit data).

Other features:

Apart from SPI functionality U2C-12 interface adapter is fitted with I2C module (See USB-I2C Interface Adapters Comparison) and 23 I/O lines that can serve as General Purpose Input-Output pins (See USB-GPIO Interface Adapters Comparison).

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According to new IHS iSuppli telecom market research, with Wi-Fi functionality becoming a standard feature in a host of electronic devices spanning televisions, cameras and car entertainment systems, shipments of wireless local area network (WLAN) chipsets will double in 2011

Shipments of WLAN chipsets, mainly Wi-Fi compatible devices, are projected to reach 738.9 million units this year, up a resounding 101.5 percent from 366.8 million units in 2010. Shipment of the chipsets will rise to exceed 1 billion units in shipments next year and then hit more than 2 billion units by 2014, as shown in the attached figure.

“Wireless connectivity has become a must-have item in electronic devices in the computer, consumer, communications and automotive markets,” said Jagdish Rebello, Senior Director & Principal Analyst (Communications & Consumer Electronics) at IHS. “These days, an electronic product not capable of communicating or accessing content at any time or in any place is regarded by consumers as deficient. This wireless revolution is contributing to a global boom in demand for Wi-Fi chipsets.”

WLAN chipsets can be found in both standalone solutions and embedded devices. The standalone category includes devices such as point/bridge routers; the embedded category comprises a broad range of electronic devices, including laptops, mobile handsets, tablets, high-definition televisions, portable media players, printers, cameras, camcorders, DVD and Blu-ray players, gaming consoles, personal navigation devices and high-end automotive head units.

While WLAN chipsets mainly are based on the 802.11n Wi-Fi standard, other connectivity technologies are also making significant inroads into the daily lives of consumers. For instance, there’s the Wireless Personal Area Networking (WPAN) segment, which encompasses disparate technologies like Bluetooth and Near Field Communications. In both the WLAN and WPAN technologies, radio waves transmit and exchange data over short distances between devices, enhancing their mobility and ease of use.

Another connectivity technology, Zigbee, is trying to gain momentum in the home automation and smart utility monitoring applications for residential and commercial building environments. Hopes are being pinned on Zigbee to achieve traction in applications like the heating, cooling and lighting of living spaces, as well as the monitoring of gas, water and electrical utilities.

“As Wi-Fi increasingly develops into a standard wireless networking interface for innumerable devices, the easy interconnection capabilities inherent in the technology will open the door for an even greater range of consumer electronic devices to be seamlessly connected and networked,” Rebello said. “In turn, significant new business opportunities can be expected to emerge for the silicon suppliers, consumer electronics manufacturers and communication service providers operating in the WLAN space.”

Broadcom Corp., which emerged as the leader among WLAN chip suppliers in 2008, maintained its top position at least through the first half of 2010. Other important suppliers are Atheros Communications, which boasts a strong position in the embedded WLAN market for notebooks; and Ralink, a fast-growing design company for integrated circuits based in Taiwan.

According to new IHS iSuppli telecom market research, with Wi-Fi functionality becoming a standard feature in a host of electronic devices spanning televisions, cameras and car entertainment systems, shipments of wireless local area network (WLAN) chipsets will double in 2011

Shipments of WLAN chipsets, mainly Wi-Fi compatible devices, are projected to reach 738.9 million units this year, up a resounding 101.5 percent from 366.8 million units in 2010. Shipment of the chipsets will rise to exceed 1 billion units in shipments next year and then hit more than 2 billion units by 2014, as shown in the attached figure.

“Wireless connectivity has become a must-have item in electronic devices in the computer, consumer, communications and automotive markets,” said Jagdish Rebello, Senior Director & Principal Analyst (Communications & Consumer Electronics) at IHS. “These days, an electronic product not capable of communicating or accessing content at any time or in any place is regarded by consumers as deficient. This wireless revolution is contributing to a global boom in demand for Wi-Fi chipsets.”

WLAN chipsets can be found in both standalone solutions and embedded devices. The standalone category includes devices such as point/bridge routers; the embedded category comprises a broad range of electronic devices, including laptops, mobile handsets, tablets, high-definition televisions, portable media players, printers, cameras, camcorders, DVD and Blu-ray players, gaming consoles, personal navigation devices and high-end automotive head units.

While WLAN chipsets mainly are based on the 802.11n Wi-Fi standard, other connectivity technologies are also making significant inroads into the daily lives of consumers. For instance, there’s the Wireless Personal Area Networking (WPAN) segment, which encompasses disparate technologies like Bluetooth and Near Field Communications. In both the WLAN and WPAN technologies, radio waves transmit and exchange data over short distances between devices, enhancing their mobility and ease of use.

Another connectivity technology, Zigbee, is trying to gain momentum in the home automation and smart utility monitoring applications for residential and commercial building environments. Hopes are being pinned on Zigbee to achieve traction in applications like the heating, cooling and lighting of living spaces, as well as the monitoring of gas, water and electrical utilities.

“As Wi-Fi increasingly develops into a standard wireless networking interface for innumerable devices, the easy interconnection capabilities inherent in the technology will open the door for an even greater range of consumer electronic devices to be seamlessly connected and networked,” Rebello said. “In turn, significant new business opportunities can be expected to emerge for the silicon suppliers, consumer electronics manufacturers and communication service providers operating in the WLAN space.”

Broadcom Corp., which emerged as the leader among WLAN chip suppliers in 2008, maintained its top position at least through the first half of 2010. Other important suppliers are Atheros Communications, which boasts a strong position in the embedded WLAN market for notebooks; and Ralink, a fast-growing design company for integrated circuits based in Taiwan.