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ISD5116EY Datasheet(Fiches technique) 49 Page - Nuvoton Technology Corporation

Numéro de pièce ISD5116EY
Description  SINGLE-CHIP
Télécharger  90 Pages
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Fabricant  NUVOTON [Nuvoton Technology Corporation]
Site Internet  http://www.nuvoton.com
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 49 page
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ISD5100 SERIES
Publication Release Date: Oct 31, 2008
- 49 -
Revision 1.42
RAC Waveform During Digital Erase @ 8kHz Operation
1.25 ms
TRACE
.25 ms
T
RACEL
INT (Interrupt)
INT is an open drain output pin. The ISD5100 Series interrupt pin goes LOW and stays LOW when an
Overflow (OVF) or End of Message (EOM) marker is detected. Each operation that ends in an EOM or
OVF generates an interrupt, including the message cueing cycles. The interrupt is cleared by a READ
STATUS instruction that will give a status byte out the SDA line.
XCLK (External Clock Input)
This is the external clock input. To use internal clock, this pin must be grounded (suggest connecting
to VSSD). While in internal clock mode, the ISD5100 Series are operated at one of four internal rates
selected for its internal oscillator by the Sample Rate Select bits. For precision timing control, external
clock signal can be applied through this pin. In the external clock mode, the device can be clocked
through the XCLK pin at 4.096 MHz as described in section 7.4.3 on page 32.
Because the anti-aliasing and smoothing filters track the Sample Rate Select bits, one must, for
optimum performance, maintain the external clock at 4.096 MHz AND set the Sample Rate
Configuration bits to one of the four values to properly set the filters to the correct cutoff frequency as
described in section 7.4.3 on page 32. The duty cycle on the input clock is not critical, as the clock is
immediately divided by two internally.
External Clock Input Table
ISD5116
Duration
(Minutes)
ISD5108
Duration
(Minutes)
ISD5104
Duration
(Minutes)
ISD5102
Duration
(Minutes)
Sample
Rate
(kHz)
Required
Clock
(kHz)
FLD1
FLD0
Filter
Knee
(kHz)
8.73
4.36
2.18
1.08
8.0
4096
0
0
3.4
10.9
5.45
2.72
1.35
6.4
4096
0
1
2.7
13.1
6.55
3.27
1.63
5.3
4096
1
0
2.3
17.5
8.75
4.37
2.18
4.0
4096
1
1
1.7




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