HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 815

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

(2)
A dial pulse is generated according to the conditions that are specified in ACTR2, and is sent out
to AFE_RLYCNT.
As the basic clock for generating the dial pulse is AFE_FS that is input from AFE, it is necessary
to make AFE in operating state. An example of control sequence for dial pulse sending is shown
below.
Note that this sequence cannot be operated when RLYC bit (ACTR2) is low.
[Conditions]
Make ratio:
Pulse interval:
Minimum pause: 600 ms
Dial number:
[Control sequence]
1. Set PPS (ACTR2) → "1", MKR → "9EH1", MNRPCNT → "1680H"
2. Set DPNQ → "AF12H".
3. Set RLYC → "H". (Off Hook)
4. Detect dial tone or wait specific period. (Controlled by software)
5. Write "1" to DPST (ACTR2). (Start sending dial pulse)
Dial Pulse Sending Sequence
33%
20 PPS
0,1234567 ("," means pause)
Count
up
1. First INT occur. RCEN (ACTR2) turns on.
2. From 2nd INT, read the RCNTV.
3. After acknowledge the ringing, RCEN (ACTR) turns off and goes
RCNTV
set
to off hook operation.
Figure 22.8
RCNTV
set
RCNTV
set
Ringing Detect Sequence
Section 22
Rev. 3.00 Jan. 18, 2008 Page 753 of 1458
Analog Front End Interface (AFEIF)
RCNTV
set
REJ09B0033-0300