EP0535838A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Digital audio interface in a GSM device
Assignee: Nokia Oyj
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Filing: 1992-09-21
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Granted: —
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Expires: 2012-09-21
Abstract
Abstract A GSM mobile telephone comprises a digital audio interface for interfacing the system simulator (SS) for testing purposes. In the arrangement according to the invention a digital signal processor (11) and a codec (12) are implemented in the same physical unit, whereby the system simulator (SS) interfaces to the telephone via a DAI block (14) and a JTAG data codec register (13) arranged in the DSP unit.
Inventors
- 👤 Arnold Von Holten
- 👤 Timo Kolehmainen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:41
CPC Classifications
H; H04; H04W; H04W24/00; H04M; H04M1/00; H04M1/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
187 words
A digital audio interface (DAI) which enables the interfacing, to the system simulator, of the output signal of the device speech decoder (101), the signal from the acoustic input (102) of the device after the analog-digital conversion (103), and the speech signal from the system simulator to the speech coder (104) of the device and to the digital-analog converter (105), whereby the speech coder (104), the speech decoder (101), the digital-analog converter (105) and the analog-digital converter (103) as well as the interfaces in between (106, 107) are implemented in the form of a circuit unit of the digital signal processor (11) and the codec (12), characterized in that a codec data register (11a) which functions as the interface between the signal processor and the codec (12) has, in addition, been installed in the signal processor (11), and a JTAG codec data register (13) between the codec data register (11a) and the test data input (TDI) and the test data output (TDO), whereby the test data input and the test data output (TDI, TDO) interface to the system simulator (SS) via the digital audio interface block (14).
Claim 2
Dependent Claim
45 words
A digital audio interface according to Claim 1, characterized in that commands which specify the reading and writing directions (1, 2, 3, 4) of the data of the JTAG codec data register (JCDX) are added to the set of commands of the signal processor (11).
Claim 3
Dependent Claim
28 words
A digital audio interface according to Claim 2, characterized in that said commands can be given from the system simulator (SS) via the JTAG codec data register (13).
References Cited (Backward Citations)
No citation records indexed.
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