AT75C1010

• Software Module Dedicated to Telephony Signaling
• Optimized for the AT75 Series Smart Internet Appliance Processor (SIAP™)
• Includes Several Run-time Configurable Independent Algorithms Caller ID Type I (On-hook) and Type II (Off-hook) DTMF Generator DTMF Detector Arbitrary Tone Generator
• Compliant with ITU-T V.23 and Bell 202 Standards
• Available With a uClinux® Device Driver

The AT75C1010 is a software module designed to run on the OakDSPCore® sub-system of the AT75 Series Smart Internet Appliance Processor. It implementscommonly used telephony algorithms:• A DTMF generator to dial phone numbers.• A DTMF detector to decode incoming DTMF signaling.• An arbitrary tone generator that can be used to generate any frequency during a programmable duration.• A Caller ID decoder that supports Type I and Type II, and two standard modulation schemes (Bellcore and V.23).

All these algorithms AT75C1010 have a number of parameters that can be programmed at runtime. These parameters modify the behavior of the DSP algorithms in such a mannerthat they comply with the applicable standards under most situations. They also allowthe AT75C to cope with many non-standard situations often encountered on privatetelephone networks.

The AT75C1010 takes advantage of the AT75 mailbox to exchange data with the on-chip ARM7TDMI® core. The organization of the data communication channel makes iteasy to integrate the AT75C 1010 interface into most operating systems.

For developers using uClinux, a specific device driver is supplied. It allows the uClinuxcapabilities to be extended to the complete functionality of the AT75C1010 module ina seamless manner.

This AT75C1010 datasheet is made up of three sections:• A functional description of the supported algorithms.• A description of the low-level software interface.• A description of the uClinux device driver.Mixing low-level and driver-level programming should be avoided.