EM78815
8-Bit Microcontroller
Tone Generators for AC Characteristic (Vdd = 3V, Ta = +25°C)
Characteristic
Tone 1/Tone 2 signal strength (root mean square voltage)
Tone 1 signal strength V1rms *1
Min.
Typ.
Max.
Unit
130
155
180
ｍV
ｍV
Tone 2 signal strength V2rms *1
1.259V1rms
Tone Twist
(Tone 1 – Tone 2) twist
Tone frequency deviation
Frequency deviation
-2
dB
%
−
−
−
±1
−
Note *1 : V1rms and V2rms has 2dB difference. It means 20log (V2rms/V1rms) = 20log1.259 = 2 (dB)
DED AC Characteristic (Vdd = +3.0V, Ta = + 25°C)
Characteristic
Min.
Typ.
-45
Max.
Unit
Input sensitivity TIP and RING for DED, DEDTHD bit=0
Input sensitivity TIP and RING for DED, DEDTHD bit=1
dBm
dBm
−
−
−
−
-35
Timing characteristic (Vdd = 3V, Ta=+25°C)
Description
Symbol
Min. Typ. Max.
Unit
Oscillator Timing Characteristic
32.768kHz
3.579MHz PLL
Tosc
1500
10
ms
us
−
−
−
−
OSC start up
−
Timing characteristic of reset
Minimum width of reset low pulse
Delay between reset and program start
FSK Timing Characteristic
Carrier detect low
Carrier detect low to data valid
Power up to FSK(setup time)
End of FSK to Carrier Detect high
Trst
Tdrs
3
uS
mS
−
18
−
−
−
Tcdl
Tcdv
Tsup
Tcdh
10
10
15
−
14
20
20
4
ms
ns
ms
ms
−
−
−
−
CW Timing Characteristic
CAS input signal length
(2130, 2750 Hz @ -20dBm)
Tcasi
80
ms
−
−
Call waiting data detect delay time
Call waiting data release time
Tcwd
Tcwr
42
26
ms
ms
−
−
−
−
DTMF Receiver Timing Characteristic
Tone Present Detection Time
The guard-times for tone-present
(C=0.1µF, R=300K)
1
Tdp
−
−
*
−
−
−
Tgtp
30
ms
The guard-times for tone-absent
(C=0.1µF, R=300K)
Propagation Delay (St to Q)
Tgta
30
8
mS
−
−
Tpq
Tda
us
ms
−
−
−
−
2
Tone Absent Detection Time
*
SPI Timing Characteristic (CPU Clock 3.58MHz and Fsco = 3.58MHz /2)
/SS set-up time
/SS hold time
SCLK high time
SCLK low time
SCLK rising time
SCLK falling time
Tcss
Tcsh
Thi
Tlo
Tr
560
250
250
250
−
ns
−
ns
ns
ns
ns
−
−
−
−
15
−
−
−
−
30
Tf
15
30
−
Product Specification (V2.4) 08.01.2004
(This specification is subject to change without further notice)
69
ELAN [ ELAN MICROELECTRONICS CORP ]
