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ISD1000A Datasheet(PDF) 6 Page - List of Unclassifed Manufacturers |
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ISD1000A Datasheet(HTML) 6 Page - List of Unclassifed Manufacturers |
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6 / 20 page  Product Data Sheets ISD1000A Series 1–6 -1 A6 or A7 = LOW) and 2. ISD1000A Series Opera- tional Mode Options (A6 AND A7 = HIGH). Operational mode options are shown in the Oper- ational Modes table. There are a maximum of 160 message addresses (or segments). Each seg- ment corresponds to one of 160 rows in the ana- log storage array. The message addresses (segments) are in locations 0 through 159 contig- uous. The playback/record duration of each seg- ment depends upon the device and is as follows: An operation may be started at any address, as defined by address pins A0-A7. Record or play- back continues with automatic incrementing of the internal on-chip address until either CE is brought HIGH (Record), an end of message marker is encountered (Playback with CE HIGH), or an over- flow (device full) condition results. OPERATIONAL MODES The ISD1000A Series is designed with several built-in operational modes provided to allow max- imum functionality with a minimum of additional components, described in detail below. The oper- ational modes use the address pins on the ISD1000A devices, but are mapped outside the valid address range. When the two Most Signifi- cant Bits (MSBs) are HIGH (A6 = A7=1), the remaining address signals are interpreted as mode bits and NOT as address bits. Therefore, operational modes and direct addressing are not compatible and cannot be used simultaneously. There are two important considerations for using operational modes. First, all operations begin ini- tially at address 0, which is the beginning of the ISD1000A address space. Later operations can begin at other address locations, depending on the operational mode(s) chosen. In addition, the address pointer is reset to 0 when the device is changed from Record to Playback, or when a Power-Down cycle is executed. Second, an Operational Mode is executed when CE goes LOW and the two MSBs are HIGH. This Operational Mode remains in effect until the next Part Number Segment Playback/Record Duration ISD1016A 100 milliseconds ISD1020A 125 milliseconds Control Mode Function Typical Use Jointly Compatible* M0 Message cueing Fast-forward through messages M4, M5 M1 Delete EOM markers Position EOM marker at the end of the last message M3, M4, M5 M2 Cascading Adding devices to extend message M3 Looping Continuous playback from Address 0 M1, M5 M4 Consecutive addressing Record/Play multiple consecutive mes- sages M0, M1, M5 M5 CE level-activated Allow message pausing M0, M1, M3, M4 OPERATIONAL MODES TABLE NOTE: An asterisk (*) indicates additional operational modes which can be used simultaneously with the given mode. 06.DataBook_1000A Dsht Page 6 Friday, September 27, 1996 10:44 AM |
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