Features :. Multi-level analog storage. Advanced, non-volatile Flash memory. SPI interface.
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SPI interface that allows a microcontroller to manage message recording and playback. This flexible arrangement allows for the widest variety of messaging options. The APR is ideal for use in cellular and cordless phones, telephone answering devices, personal digital assistants, personal voice ecorders,and voice pagers. This circuit decodes all the SPI signals and generates all the internal control signals.
It also contains the status register used for examining the current status of the APR The name of the OpCode appears in the left hand column. The following two columns represent the actual binary information contained in the 20 bit data stream. Some commands have limits on which command can follow them. A0] bits according to the following binary values APR Follow Summary Starts a record operation from the sector address specified. Starts a record operation from the current sector address.
Erases all data contained in specified sector. You must not erase a sector before recording voice signals into it For more information see the section entitled Recording Audio Data. Erase should not be done before recording voice signals into a sector.
Erase must be done before storing digital data in a sector The Overflow flag is set overflow has not occurred. Device status and silicon ID are described in the next two sections. Retrieval of user The following five bits represent the product family.
The next four bits represent the device code. The APR device code is binary as shown in Figure The last seven bits are random data and should be ignored These bits will not be stored in the array and must be considered don't care bits.
All bits must be stored. Four additional buffer bits must be clocked into the device following the stored data There are four random don't care bits following the bits of user data. An incomplete read is defined as a read with less than clock cycles.
When the first sector These signals can simplify message management significantly depending on the message management scheme used. SPI interface section paragraph.
The default power up condition for the APR is to use the internal oscillator at sampling frequency of 6. Several vendors supply integrated speaker amplifiers that can be used for this purpose. A microphone amplifier and AGC are recommended. Both blocks are optional. Pin Pad No. Absolute Maximum Ratings Stresses greater than those listed in Table 4 may cause permanent damage to the device. These specifications represent a stress rating only. About Contact Requests Pricing Request parts.
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