122
EPSON
S1C63558 TECHNICAL MANUAL
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Telephone Function)
4.14.6 Pause
This dialer allows insertion of a pause within 1 to 15 seconds between each two digits of tone signals or
pulses. The pause time should be set to the PTS3–PTS0 register (FF11H) as shown in Table 4.14.6.1 before
dialing.
Table 4.14.6.1 Pause time selection
D3
0
0
0
0
0
0
0
0
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
PTS
Pause time (sec)
Unavailable *
1
2
3
4
5
6
7
D3
1
1
1
1
1
1
1
1
D2
0
0
0
0
1
1
1
1
D1
0
0
1
1
0
0
1
1
D0
0
1
0
1
0
1
0
1
PTS
Pause time (sec)
8
9
10
11
12
13
14
15
∗
Do not write "0" (0000B) to the PTS register because it may cause a malfunction.
At initial reset, the pause time is set to 4 seconds.
Writing data to the PTS register just defines the pause time. The actual pause operation will be activated
when the PAUSE bit (FF14H•D1) is set to "1".
Figure 4.14.6.1 shows the timing chart of the pause function.
t
PS
"0"
t
IDP
:
t
MH
:
t
PS
:
Inter-digit pause time
Mute hold time
Pause time
HSON
(FF18H•D3)
Data bus
Write to TCD
(FF17H)
DP
XRMUTE(R11)
XTMUTE(R10)
Interrupt
request
2
3
Pause
Write to PAUSE
(FF14H•D1)
t
IDP
t
IDP
t
MH
t
MH
"0'
"0"
"0"
"1"
"1"
Fig. 4.14.6.1(a) Pause execution timing chart in pulse mode