Datasheet

STPMC1 Theory of operation
Doc ID 15728 Rev 7 39/77
Example 12: Phase delay calculation
f
XTAL1
= 4 MHz; MDIV = 0; FR1 = 0 → f
MCLK
= 8 MHz
f
LINE
= 50 Hz → T = 20 ms;
ACR[7:0] = 0101 1010
ACS[7:0] = 0010 0000
ACT[7:0] = 0000 0101
Asr[12] = 0
Asr[10:0] = 000 0101 0010
2
= 82
Art[12] = 0
Art[10:0] = 00001011010
2
= 90
Example 13: Phase delay calculation
f
XTAL1
= 4 MHz; MDIV = 0; FR1 = 0 → f
MCLK
= 8 MHz
f
LINE
= 50 Hz → T = 20 ms;
ACR[7:0] = 1011 0011
ACS[7:0] = 0011 1111
ACT[7:0] = 0000 0101
Asr[12] = 0
Asr[10:0] = 000 0101 0011
2
= 83
Art[12] = 1
Art[10:0] = 111 1011 0011
2
= 1971
[] ()
[]
()
°+=°⋅
μ
⇒
μ+=
⋅
⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=
5,1360
ms20
s82
s82
108
8
1200000101001
MCLK
8
120:10Asrtime
6
0
11
2
12Asr
11
Asr
[]
()
[]
()
°+=°⋅
μ
⇒
μ+=
⋅
⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=
6,1360
ms20
s90
s90
108
8
1200000101101
MCLK
8
120:10Arttime
6
0
11
2
12Art
11
Art
[]
()
[]
()
°+=°⋅
μ
⇒
μ+=
⋅
⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=
5,1360
ms20
s83
s83
108
8
1210000101001
MCLK
8
120:10Asrtime
6
0
11
2
12Asr
11
Asr
[]
()
[]
()
°−=°⋅
μ−
⇒
μ−=
⋅
⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=⋅
⎟
⎠
⎞
⎜
⎝
⎛
+−=
4,1360
ms20
s76
s76
108
8
1211111011001
MCLK
8
120:10Arttime
6
1
11
2
12Art
11
Art