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CHAPTER 7: ELECTRICAL CHARACTERISTICS
7.8 Telephone Function Characteristics
Unless otherwise specified:
V
=3.0V, V
=0V, f
=3.579545MHz, Ta=-20 to 70 C
DD
SS
CLK
Item
Flash pause time
Mute hold time
Make ratio
Dial puls rate
Make time
Break time
Tone output DC level
ROW single tone
output voltage
COL single tone
output voltage
Tone output voltage ratio
Tone load resistor
Tone distortion ratio
Tone output frequency
Tone output time
Tone inter-digit pause time
Tone output cycle
7.9 Timing Chart
System clock switching
OSCC
CLKCHG
166
Symbol
Condition
t
FLP
t
MH
M/B
Selected by software
DR
Selected by software
t
10pps, M/B=1/2
M
20pps, M/B=1/2
10pps, M/B=2/3
20pps, M/B=2/3
t
10pps, M/B=1/2
B
20pps, M/B=1/2
10pps, M/B=2/3
20pps, M/B=2/3
V
TDC
V
V
=3V, R
=10k
R
DD
L
V
=5.5V, R
=10k
DD
L
V
V
=3V, R
=10k
C
DD
L
V
=5.5V, R
=10k
DD
L
dB
V
=3V, R
=10k
CR
DD
L
V
=5.5V, R
=10k
DD
L
R
V
=2.5 to 5.5V
TL
DD
THD
V
=2.5 to 5.5V, R
DD
f
ROW1
f
ROW2
f
ROW3
f
ROW4
f
COL1
f
COL2
f
COL3
f
COL4
t
TD
t
TIP
t
t
t
+
T
TD
TIP
5 msec min.
Min.
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7
=10k
–
L
–
–
–
–
–
–
–
–
94
–
188
1 instruction execution
time or longer
EPSON
Typ.
Max.
Unit
938
–
ms
4
–
ms
1/2
–
2/3
10
–
pps
20
33.2
–
ms
16.6
–
ms
39.1
–
ms
19.5
–
ms
66.4
–
ms
33.2
–
ms
58.6
–
ms
29.3
–
ms
0.5(
)
–
V
V
-V
DD
SS
92
–
mVrms
168
–
mVrms
122
–
mVrms
224
–
mVrms
2.5
–
dB
2.5
–
dB
–
–
k
–
6
%
701.32
–
Hz
771.45
–
Hz
857.17
–
Hz
935.10
–
Hz
1215.88
–
Hz
1331.68
–
Hz
1471.85
–
Hz
1645.01
–
Hz
–
–
ms
94
–
ms
–
–
ms
S1C63558 TECHNICAL MANUAL
–
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