N681622YG Nuvoton Technology Corporation of America, N681622YG Datasheet - Page 41

• Manufacturer Part Number: N681622YG
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of N681622YG

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Sinusoidal Ringing is selected by setting RMPC:TRAP[7] address (0xC1) to LOW. For a desired frequency f
calculated and programmed as before (see section Tone Generation). The oscillator initial condition for oscillator 2 is
set in register O2IC[15:0] address (0xC4 – 0xC5) according to the following equation.
Desired frequency f
The resulting hexadecimal coefficient is input to registers
OS2CH and OS2C and ROFFS
Oscillator initial condition for oscillator 2
The resulting hexadecimal coefficient is input to registers
OS2ICH and OS2ICL
A is calculated from the desired peak amplitude,
A
Note that A is calculated differently for Tone Generation. Finally the precise phase position where the sinusoidal
ringing signal begins transmitting can be controlled by programming a transmission or phase delay of up to 31.8 ms
into OS2RPD:O2RPD[7:0] address (0xAD). If the zero-crossing feature is enabled signal transmission will end at the
equivalent phase position.
PK
Preliminary Datasheet Rev1.0
, in volts
12.1.3.2.1.
R
Description
Frequency
Target
(Hz)
SINUSOIDAL RINGING
10
11
12
13
14
15
16
17
18
19
20
25
50
Table 16: Example Ringer Register settings
Page 41 of 164
Frequency (Hz)
O2C
O2IC
A =
11.12
11.12
12.18
13.15
14.07
15.73
16.49
17.22
18.60
19.27
20.51
25.37
50.26
[17
[15
A
96
PK
:
Single Programmable Extended Codec/SLCC
:
0]
0]
=
=
COS
A
O2C[17:0]
*
1FFFB
1FFFB
1FFFA
1FFF9
1FFF8
1FFF6
1FFF5
1FFF4
1FFF2
1FFF1
1FFEF
1FFE6
1FF9A
⎡
⎢
⎢
⎢
⎢
⎣
sin
2
Equation
*
⎡
⎢
⎢
⎢
⎢
⎣
8
2
π
kHz
*
8
*
π
kHz
R f
*
⎤
⎥
⎥
⎥
⎥
⎦
N681386/87
R f
*
⎤
⎥
⎥
⎥
⎥
⎦
2
17
*
2
January 2010
15
R
is