Oki Electric has announced their ML7257 [.jpg here] base band LSI which incorporates voice and data communication functions in a single chip. OKI succeeded in including the three types of modulation and demodulation functions defined by W-OAM, as well as all the voice compression functions in a single device. Thus, power consumption is reduced to two-thirds that of conventional DSP-based software solutions. For the CPU core, the LSI uses ARM7TDMI, which is used in many mobile phones and PDAs around the world because of its high-performance, low power consumption and high-code efficiency.
W-OAM ensures stable communication by automatically selecting the modulation method depending on the frequency status. With this LSI, PHS data terminal vendors can easily develop W-OAM-compliant terminals for WILLCOM. The ML7257 also includes an application processor interface for adding functions to PHS data terminals, such as advanced applications for high-function terminals. Thus, vendors can also develop terminals with dual CPUs using the application processor.
This LSI is compliant with W-OAM, the Advanced PHS communications standard that enables a communication speed of 204kbps, which is 1.6 times faster than the conventional speed of 128kbps. The LSI will be used in three new handsets announced by WILLCOM,Inc., the sole provider of PHS (Personal Handyphone Services) in Japan.