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166 EPSON S1C63558 TECHNICAL MANUAL
CHAPTER 7: ELECTRICAL CHARACTERISTICS
7.8 Telephone Function Characteristics
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
Symbol
tFLP
tMH
M/B
DR
tM
tB
VTDC
VR
VC
dBCR
RTL
THD
fROW1
fROW2
fROW3
fROW4
fCOL1
fCOL2
fCOL3
fCOL4
tTD
tTIP
tT
Unit
ms
ms
–
pps
ms
ms
ms
ms
ms
ms
ms
ms
V
mVrms
mVrms
mVrms
mVrms
dB
dB
kΩ
%
Hz
Hz
Hz
Hz
Hz
Hz
Hz
Hz
ms
ms
ms
Max.
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
6
–
–
–
–
–
–
–
–
–
–
–
Typ.
938
4
1/2
2/3
10
20
33.2
16.6
39.1
19.5
66.4
33.2
58.6
29.3
0.5(
V
DD
-V
SS
)
92
168
122
224
2.5
2.5
–
–
701.32
771.45
857.17
935.10
1215.88
1331.68
1471.85
1645.01
–
94
–
Min.
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
7
–
–
–
–
–
–
–
–
–
94
–
188
Condition
Selected by software
Selected by software
10pps, M/B=1/2
20pps, M/B=1/2
10pps, M/B=2/3
20pps, M/B=2/3
10pps, M/B=1/2
20pps, M/B=1/2
10pps, M/B=2/3
20pps, M/B=2/3
VDD=3V, RL=10kΩ
VDD=5.5V, RL=10kΩ
V
DD=3V, RL=10kΩ
VDD=5.5V, RL=10kΩ
VDD=3V, RL=10kΩ
V
DD=5.5V, RL=10kΩ
VDD=2.5 to 5.5V
VDD=2.5 to 5.5V, RL=10kΩ
tTD+tTIP
Unless otherwise specified:
VDD=3.0V, VSS=0V, fCLK=3.579545MHz, Ta=-20 to 70°C
7.9 Timing Chart
System clock switching
OSCC
CLKCHG
5 msec min.
1 instruction execution
time or longer