SAA2521GP Philips, SAA2521GP Datasheet
SAA2521GP
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SAA2521GP Summary of contents
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DATA SHEET SAA2521 Masking threshold processor for MPEG layer 1 audio compression applications Preliminary specification File under Integrated Circuits, IC01 INTEGRATED CIRCUITS August 1993 ...
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... Reduced power consumption 4 V nominal operating voltage capability. ORDERING INFORMATION EXTENDED TYPE NUMBER PINS SAA2521GP 44 Note 1. SOT205-1; 1996 August 23. August 1993 GENERAL DESCRIPTION The SAA2521 performs the adaptive allocation and scaling function for calculating the masking thresholds and sub-band sample accuracy in MPEG layer 1 applications ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications handbook, full pagewidth 31 SWS 39 FS256 34 FDAF INTERFACE 20 NODONE 21 RESOL0 22 RESOL1 37 FDIR 36 FRESET 35 FSYNC 38 SCALE 15 TEST3 16 TEST4 5 LTDATA 1 LTCNT1 2 LTCNT0 3 LTENA 4 LTCLK 26 CLK24 23 RESET 30 PWRDWN August 1993 COMPENSATION DELAY SAA2521 CONTROL LT INTERFACE Fig ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications handbook, full pagewidth LTCNT1 LTCNT0 LTENA LTCLK LTDATA V SS LTCNT1C LTCNT0C LTENC LTCLKC LTDATAC handbook, full pagewidth AUDIO AMPLIFIER SOURCE ADC/DAC MICROCONTROLLER August 1993 SAA2521 Fig ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications PINNING SYMBOL PIN LTCNT1 1 LTCNT0 2 LTENA 3 LTCLK 4 LTDATA LTCNT1C 7 LTCNT0C 8 LTENC 9 LTCLKC 10 LTDATAC 11 TEST1 12 TEST2 TEST3 15 TEST4 16 TEST5 17 TEST6 18 TEST7 19 NODONE 20 RESOL0 21 RESOL1 22 RESET ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications SYMBOL PIN n.c. 41 n. Note to the Pinning Description 1. The scale input must be set LOW for use with the SAA2521. FUNCTIONAL DESCRIPTION Coding System This efficient MPEG audio encoder is used in conjunction with the SAA2520 filter codec (bit rates of 384, 256, 192 and 128 k bits/s) ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications Microcontroller Interface Operation Information on the interface between microcontroller and codec (SAA2520) will flow in a regular sequence synchronized with the codec (SAA2520): - with every FSYNC the SAA2521 will read the status of ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications Power-down Mode Switching When the potential on the RESET pin (pin 23) is held HIGH for at least 5T clock periods, the device will be reset CLK24 after which it will operate in its decoding mode. The power-down mode is activated when the PWRDWN pin (pin 30) is held HIGH ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications channel SWS SCL 1 FDA bit : 2 3 msb channel SWS FSYNC sub-band August 1993 left 32 bits 7 bits lsb Fig.6 Format for transferring filtered data ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications 2 Table 2 The (Filtered S-interface. SWS input SCL input FDAF bi-directional FDAC bi-directional FSYNC input 2 Table 3 The (Filtered S-interface. FRESET input FDIR input 2 (Filtered S-interfaces Interfaces with the sub-band filter and codec (SAA2520) consist of the following signals ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications SCL output input OUTPUT applies to FDAF and FDAC in the output mode. INPUT applies to FDAF and FDAC in the input mode, SWS and FSYNC one F 256 cycle time minimum HIGH time SCL ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications Table 4 SAA2521 interface with microcontroller. LTCLK input LTDATA bi-directional LTCNT0 input LTCNT1 input LTENA input Table 6 SAA2521 interface control lines functions. LTCNT1(C) LTCNT0( Microcontroller Interface Two microcontroller interfaces are provided; one for connection to the microcontroller interface of the SAA2520, the other to connect to the system controller ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications LTENA/C LTCNT0(C)/1(C) LTCLK(C) LTDATA(C) Fig.9 Example of information transfer via SAA2521 interfaces. LTENA/C LTCNT0(C)/1(C) LTCLK(C) LTDATA(C) Refer to the SAA2520 description for the meaning of these bits as they pass SAA2521 unchanged. August 1993 ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications Extended settings (LTCNT1(C) = logic 0, LTCNT0(C) = logic 0) Eight information bits, generated by the microcontroller, are transferred in this mode. The SAA2521 will transfer these bits to the SAA2520 as soon as possible but does not monitor this information. ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications With stereo encoding, Left and Right channels are designated L and R. This changes to channels for 2-channel mono mode. If SCALE = logic 0 the transfer of allocation information will be followed by the transfer of scale factors. Each 16-bit transfer contains two scale factor indices ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications SETTINGS (LTCNT1(C) = logic 1, LTCNT0(C) = logic 0) Without using the information, the SAA2521 transfers microcontroller settings to the SAA2520. Prior to sending settings, the microcontroller would utilize the SAA2521 status readings to ensure its readiness to accept and convey the data ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications Status (LTCNT1(C) = logic 1, LTCNT0(C) = logic 1) The SAA2520 and SAA2521 operation may be checked by reading these bits. All, except the ready-to-receive bits, are generated by the SAA2520. The bit rate index indicates the bit rate of the sub-band signal in units of 32 kbits/s ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications LTENA/C LTCNT0(C)/1(C) LTCLK(C) LTDATA(C) bit : Sample frequency indication. MSB LSB 00 44.1 kHz 01 48 kHz 10 32 kHz 11 -- MODE identification. MSB LSB MODE 00 stereo 01 joint stereo channel mono channel mono ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications Table 11 Frequency examples. BIT RATE F S 256 kbit/s 48 kHz 192 kbit/s 48 kHz 44.1 kHz 128 kbit/s 48 kHz 44.1 kHz 32 kHz LTENA LTCNT0/1 LTCLK LTDATA bit : t > 210 ns minimum LOW time LTENA prior to transfer ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications LTENA LTCNT0/1 LTCLK t > 550 ns minimum time between two 8-bit transfers w1 LTENA LTCNT0/1 t su4 LTCLK LTDATA bit : t > 210 ns minimum LOW time LTENA prior to transfer le t > set-up time LTCNT0, 1 before LTENA HIGH ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications LTENA LTCNT0/1 LTCLK t > 550 ns minimum time between two 8-bit transfers w2 LTENC LTCNT0(C)/1(C) t su4 LTCLKC LTDATAC bit : t > 400 ns minimum LOW time LTENA prior to transfer le t > 400 ns set-up time LTCNT0, 1C before LTENC HIGH ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications LTENC LTCNT0(C)/1(C) LTCLKC t > 600 ns minimum time between two 8-bit transfers w2 LTENC LTCNT0(C)/1(C) LTCLKC LTDATAC bit : t > 400 ns minimum LOW time LTENC prior to transfer le t > 400 ns set-up time LTCNT0, 1C before LTENC HIGH ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications LTENC LTCNT0(C)/1(C) LTCLKC t > 600 ns minimum time between two 8-bit transfers w1 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL V supply voltage DD V input voltage (note ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications DC CHARACTERISTICS V = 3 unless otherwise specified. DD amb SYMBOL PARAMETER Supply V supply voltage range DD I operating current DD I operating current DD I stand-by current PWRDWN Inputs V LOW level input voltage ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications AC CHARACTERISTICS V = 3 amb SYMBOL PARAMETER CLOCK CLK24 f frequency s CLOCK F 256 s f frequency s Inputs FSYNC, SWS, LTCNT1, LTCNT0, LTENA, LTCLK, LTDATA, LTDATAC, FDAF, FDAC, SCL, SWS C input capacitance ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications PACKAGE OUTLINE QFP44: plastic quad flat package; 44 leads (lead length 2.35 mm); body 2 pin 1 index DIMENSIONS (mm are the original dimensions) A UNIT max. ...
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... Philips Semiconductors Masking threshold processor for MPEG layer 1 audio compression applications SOLDERING Introduction There is no soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and surface mounted components are mixed on one printed-circuit board. However, wave soldering is not always suitable for surface mounted ICs, or for printed-circuits with high population densities ...
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... These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale. ...