SA9401
Finally the system designer should calculate the PCM sample value for each of the 240
samples in the block. The PCM values used may of course be calculated according to
either A or µ-law and adjusted to suit the required amplitude.
Up to 16 Tone Blocks may be defined each with a maximum of 511 samples. Tone
Blocks are stored in the EPROM starting at address b * 0200H where b is the number of
the block from 0 to 15 (decimal).
APPLICATION INFORMATION
To simplify the translation of Tone Plan requirements to EPROM data SAMES offer a
Support Software pack. This elegant package will guide the designer through the defi-
nition of Tone Plans and translate the requirements into a hex source file ready for most
commonly used PROM programmers. For more details contact your nearest SAMES
representative.
AC PARAMETERS
TA = 0°C to + 70°C, VCC = 5V ± 5%. Load Cap<= 50pf
AC PARAMETERS
SYM MIN TYP MAX UNITS
Propagation delay of outputs synchronous to
CLKIN (i.e. 2MCLK, CLKDIV2, and
WD_INT) relative to CLKIN rising clock edge
Pd8M
0
20
40
ns
ns
ns
Propagation delay of outputs synchronous
to 2MCLK (i.e. INTRFRQ, 8KFS, PCMFSC,
INTRCAD, PCM_OUT, A0..A13
Pd2M
0
20
40
Delay to float of PCM_OUT AFTER LAST BIT
OF TIME-SLOT OUTPUT
Pfpo
0
0
30
30
60
60
Delay to float of WD_INT after going inactive
D0..D7 setup to 2MCLK rising edge
PfWD
ns
ns
ns
SdD 100
HdD
D0..D7 hold after 2MCLK rising edge
0
Absolute Maximum Ratings*
Parameters
Symbol
VDD
Min
Max
7.0
Unit
V
Supply Voltage
-0.3
-0.3
-10
Voltage on any I/O pin
Current on any I/O pin
Storage Temperature
Package Power Dissipation
VI/V0
II/I0
VDD +0.3
+10
V
mA
°C
TSIG
-55
+125
1000
PD
mW
*Stressabovethoselistedunder"AbsoluteMaximumRatings"maycausepermanentdamage
tothedevice. Thisastressratingonly. Functionaloperationofthedeviceattheseoranyother
condition above those inidcated in the operational sections of this specification, is not implied.
Exposure to Absolute Maximum Ratings for extended periods may effect device reliability.
12
sa me s
SAMES [ SAMES ]
