AK2363 Datasheet, PDF (15/33 Pages) Asahi Kasei Microsystems – Radio Signaling LSI

ASAHI KASEI
[AK2363]
5) DTMF Receiver timing
Parameter
Symbol
Condition
Min. Typ. Max. Unit
Tone present detection time(reference value)
t_DP
AGC Disable
AGC Enable
5
11 16.8 ms
5
20 44 ms
Tone absent detection time (reference value) t_DA
0.5 4 8.5 ms
Tone duration accept time *1)
AGC Disable
t_REC
GTP[3:0]=0100
AGC Enable
GTP[3:0]=0001
54.5
54
ms
ms
Tone duration reject time*1)
t_REJ
32.2 ms
Interdigit pause accept time *1)
t_ID
28.4
ms
Interdigit pause reject time *1)
GT (internal counter) to STD propagation
delay
t_DO
t_PSTD
1.6 ms
21.7
ms
STD rising to LOADN falling time
t_DL
100
ns
ACK low period
t_CLL
500
ns
ACK high period
LOADN setup time
SD output delay time
SD output disable time
ACK rising time
ACK falling time
t_CLH
500
t_LS
500
t_PD Loaded by 20pF
t_DF Loaded by 20pF
t_CLR
t_CLF
ns
ns
200 ns
200 ns
100 ns
100 ns
*1) The data shows the values when registers GTPn and GTAn (n = 0 to 3) contain their initial values.
This data can be adjusted by setting registers GTPn and GTAn (n = 0 to 3) (refer to pages 26 and
27).
*2) Digital input timing measurements are made at 0.5VDD for rising edges and falling edges.
Digital output timing measurements are made at 0.5VDD for rising edges and falling edges.
MS0583-E-01
- 15 -
2008/06