AK2305 Datasheet, PDF (20/43 Pages) Asahi Kasei Microsystems – Dual PCM CODEC for ISDN TERMINAL ADAPTER

ASAHI KASEI
Relation between GTPn(n=0- 3) Register and
GUARD TIME(t_{GTP) /} Input Signal Available Time(t_REC)
GTP Register
3210
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
tGTP[ms]
typ
1
9
17
25
33
41
49
57
65
73
81
89
97
105
113
121
tREC[ms]=tGTP+tDP
min typ max
6
12
15
14
20
23
22
28
31
30
36
39
38
44
47
46
52
55
54
60
63
62
68
71
70
76
79
78
84
87
86
92
95
94 100 103
102 108 111
110 116 119
118 124 127
126 132 135
[AK2305]
tDP[ms]
min typ max
5
11
14
tGTP default
Relation between GTAn(n=0- 3) Register and
GUARD TIME(t_{GTA) /} Inter Digit Pause Time(t_ID )
GTA Register
3210
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
tGTA[ms]
typ
1
9
17
25
33
41
49
57
65
73
81
89
97
105
113
121
tID[ms]=tGTA+tDA
min typ max
1.5
5 9.5
9.5
13 17.5
17.5
21 25.5
25.5
29 33.5
33.5
37 41.5
41.5
45 49.5
49.5
53 57.5
57.5
61 65.5
65.5
69 73.5
73.5
77 81.5
81.5
85 89.5
89.5
93 97.5
97.5
105.5
113.5
101 105.5
109 113.5
117 121.5
121.5 125 129.5
tDA[ms]
min typ max
0.5
4 8.5
tGTA default
NOTE
tGTA in tables above are typical value. Regard the margin of ±1ms.
C0029-E-02
20
1999/8