Electronic Components Datasheet Search |
|
ISD5008SI Datasheet(PDF) 5 Page - List of Unclassifed Manufacturers |
|
ISD5008SI Datasheet(HTML) 5 Page - List of Unclassifed Manufacturers |
5 / 47 page ISD5008 Product 2 Voice Solutions in Silicon™ 2PIN DESCRIPTIONS 2.1 DIGITAL I/O PINS SCLK (Serial Clock) The SCLK is the clock input to the ISD5008. Gener- ated by the master microcontroller, the SCLK syn- chronizes data transfers in and out of the device through the MISO and MOSI lines. Data is latched into the ISD5008 on the rising edge of SCLK and shifted out on the falling edge. SS (Slave Select) This input, when LOW, will select the ISD5008 de- vice. MOSI (Master Out Slave In) MOSI is the serial data input to the ISD5008 de- vice. The master microcontroller places data to be clocked into the ISD5008 device on the MOSI line one-half cycle before the rising edge of SCLK. Data is clocked into the device LSB (Least Signifi- cant Bit) first. MISO (Master In Slave Out) MISO is the serial data output of the ISD5008 de- vice. Data is clocked out on the falling edge of SCLK. This output goes into a high-impedance state when the device is not selected. Data is clocked out of the device LSB first. INT (Interrupt) INT is an open drain output pin. The ISD5008 inter- rupt pin goes LOW and stays LOW when an Over- flow (OVF) or End of Message (EOM) marker is detected. Each operation that ends in an EOM or OVF generates an interrupt, including the mes- sage cueing cycles. The interrupt is cleared the next time an SPI cycle is completed. The interrupt status can be read by a RINT instruction that will give one of the two flags out the MISO line. OVF Flag. The overflow flag indicates that the end of the ISD5008’s analog memory has been reached during a record or playback operation. EOM Flag. The end of message flag is set only during playback, when an EOM is found. There are eight possible EOM markers per row. RAC (Row Address Clock) RAC is an open drain output pin that marks the end of a row. At the 8 kHz sample frequency, the duration of this period is 200 ms. There are 1,200 rows of memory in the ISD5008 devices. RAC stays HIGH for 175 ms and stays LOW for the remaining 25 ms before it reaches the end of the row. The RAC pin remains HIGH for 109.38 µsec and stays LOW for 15.63 µsec under the Message Cue- ing mode. See Table 15 Timing Parameters for RAC timing information at other sample rates. When a record command is first initiated, the RAC pin remains HIGH for an extra T RACLO period, to load sample and hold circuits internal to the de- vice. The RAC pin can be used for message man- agement techniques. XCLK (External Clock Input) The external clock input for the ISD5008 product has an internal pull-down device. Normally, the ISD5008 is operated at one of four internal rates selected for its internal oscillator by the Sample Rate Select bits. If greater precision is required, the device can be clocked through the XCLK pin as described in Table 2. Because the antialiasing and smoothing filters track the Sample Rate Select bits, one must, for optimum performance, change the external clock AND the Sample Rate Configuration bits to one of the four values to properly set the filters to the correct cutoff frequency as described in Table 3. The duty cycle on the input clock is not critical, as the clock is immediately divided by two inter- nally. If the XCLK is not used, this input should be connected to V SSD . |
Similar Part No. - ISD5008SI |
|
Similar Description - ISD5008SI |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |