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DS2167 Datasheet(PDF) 4 Page - Dallas Semiconductor |
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DS2167 Datasheet(HTML) 4 Page - Dallas Semiconductor |
4 / 15 page DS2167/DS2168 022698 4/15 HARDWARE MODE The hardware mode is intended for preliminary system prototyping or for applications which do not require the features of the serial port. Tying SPS to VSS disables the serial port, clears all internal registers and maps IPD, µ/A and CP/EX of the X and Y side interfaces to the port and address inputs. Input and output timeslots for the X and Y side interfaces are fixed at 0. Such applica- tions include, but are not limited to: 1) systems in which timeslot and algorithm are fixed, 2) stand-alone ADPCM combo applications, 3) “hardware” oriented systems where no host controller is available. HARDWARE MODE Table 2 PIN #/NAME REG. LOCATION NAMES AND DESCRIPTION 4/A0 CP/EX (X) Channel X coding 0 = Expand 1 = Compress 6/A2 µ/A (X) Channel X data format 0 = A-law 1 = µ-law 7/A3 CP/EX (Y) Channel Y coding 0 = Expand 1 = Compress 9/A5 µ/A (Y).2 Channel Y data format 0 = A-law 1 = µ-law 18/SDI IPD (Y) Y idle select 0 = Channel active 1 = Channel idle 19/CS IPD (X) X idle select 0 = Channel active 1 = Channel idle NOTES: 1. SCLK, A1 and A4 must be tied to VSS when the hardware mode is selected. 2. When both X and Y sides are idled, the devices enter a stand-by mode which significantly reduces power consumption. 3. The DS2167 will power-up within 200 ms after the X or Y side is reactivated (SDI and/or CS not equal to 0) from standby. 4. The DS2168 must be hardware reset when reactivated from standby. Power-up occurs immediately after the reset. |
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