J-Tech Engineering - Web Browser Phone

www-Enabled Telephone

CL-PS7111 Based Internet browser capable phone

The above image is of an early revision of the board. The small board over the main processor is a serial port level shifter. For debugging purposes, an extra serial port was highly desirable.

The following features were implemented on the phone:

Cirrus Logic CL-PS7111 (ARM 710A core) - with the following additional Hardware:
- Flash (6Mx8).
- DRAM (1,2 or 4Meg x 32bit).
- Message Wait LED.
- LCD with ¼ VGA resolution (320 x 240), 16 shades of grey.
- Real time clock.
- Keyboard (membrane) on slide-out tray.
- Keypad (membrane style).
- Serial Port (RS-232) (DB9).
- Smart Card Slot.
Texas Instruments TMS320C548-80 DSP with the following additional hardware:
- 64KBytes SRAM.
- Two telephony Analogue Interface Codecs (AICs).
- One DAA for interfacing one of the codecs to a standard PSTN 2-Wire Interface.
- One 4-wire interface for controlling the handset and speaker/microphone (speakerphone) devices.
- Control/Status register to the DSP for controlling the DAA and 4-wire interface.
- Microphone.
- Speaker.
- Handset.

The two processors communicate via the Host Port Interface on the DSP. The 7111 processor is the master, while the DSP is used to control the bulk of telephony functions. A completed unit is shown at right.

This product was sold as a component of a complete telephone by M-Power Incorporated. M-Power can be contacted at:

http://www.m-power.com

Alternatively, inquiries regarding purchase of the unit can be directed to J-Tech Engineering. Please see the company info page for contact information. Note that where interest in purchasing the above hardware is concerned, this is not an offer for sale, but merely an offer of redirection to the vendors of the product.